PM / devfreq: documentation cleanups for devfreq header

struct parameters need to have ':' in documentation for
scripts/kernel-doc to parse appropriately.

Fix the errors reported by:
./scripts/kernel-doc include/linux/devfreq.h >/dev/null

Cc: Rajagopal Venkat <[e-mail]>
Cc: MyungJoo Ham <[e-mail]>
Cc: Kyungmin Park <[e-mail]>
Cc: "Rafael J. Wysocki" <[e-mail]>
Cc: Kevin Hilman <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]

Signed-off-by: Nishanth Menon <[e-mail]>
Acked-by: Randy Dunlap <[e-mail]>
Acked-by: MyungJoo Ham <[e-mail]>
Signed-off-by: MyungJoo Ham <[e-mail]>

include/linux/devfreq.h

···
  * struct devfreq_dev_status - Data given from devfreq user device to
  *			     governors. Represents the performance
  *			     statistics.
- * @total_time		The total time represented by this instance of
+ * @total_time:		The total time represented by this instance of
  *			devfreq_dev_status
- * @busy_time		The time that the device was working among the
+ * @busy_time:		The time that the device was working among the
  *			total_time.
- * @current_frequency	The operating frequency.
- * @private_data	An entry not specified by the devfreq framework.
+ * @current_frequency:	The operating frequency.
+ * @private_data:	An entry not specified by the devfreq framework.
  *			A device and a specific governor may have their
  *			own protocol with private_data. However, because
  *			this is governor-specific, a governor using this
···
 
 /**
  * struct devfreq_dev_profile - Devfreq's user device profile
- * @initial_freq	The operating frequency when devfreq_add_device() is
+ * @initial_freq:	The operating frequency when devfreq_add_device() is
  *			called.
- * @polling_ms		The polling interval in ms. 0 disables polling.
- * @target		The device should set its operating frequency at
+ * @polling_ms:		The polling interval in ms. 0 disables polling.
+ * @target:		The device should set its operating frequency at
  *			freq or lowest-upper-than-freq value. If freq is
  *			higher than any operable frequency, set maximum.
  *			Before returning, target function should set
  *			freq at the current frequency.
  *			The "flags" parameter's possible values are
  *			explained above with "DEVFREQ_FLAG_*" macros.
- * @get_dev_status	The device should provide the current performance
+ * @get_dev_status:	The device should provide the current performance
  *			status to devfreq, which is used by governors.
- * @get_cur_freq	The device should provide the current frequency
+ * @get_cur_freq:	The device should provide the current frequency
  *			at which it is operating.
- * @exit		An optional callback that is called when devfreq
+ * @exit:		An optional callback that is called when devfreq
  *			is removing the devfreq object due to error or
  *			from devfreq_remove_device() call. If the user
  *			has registered devfreq->nb at a notifier-head,
···
 
 /**
  * struct devfreq_governor - Devfreq policy governor
- * @name		Governor's name
- * @get_target_freq	Returns desired operating frequency for the device.
+ * @name:		Governor's name
+ * @get_target_freq:	Returns desired operating frequency for the device.
  *			Basically, get_target_freq will run
  *			devfreq_dev_profile.get_dev_status() to get the
  *			status of the device (load = busy_time / total_time).
  *			If no_central_polling is set, this callback is called
  *			only with update_devfreq() notified by OPP.
- * @event_handler       Callback for devfreq core framework to notify events
+ * @event_handler:      Callback for devfreq core framework to notify events
  *                      to governors. Events include per device governor
  *                      init and exit, opp changes out of devfreq, suspend
  *                      and resume of per device devfreq during device idle.
···
 
 /**
  * struct devfreq - Device devfreq structure
- * @node	list node - contains the devices with devfreq that have been
+ * @node:	list node - contains the devices with devfreq that have been
  *		registered.
- * @lock	a mutex to protect accessing devfreq.
- * @dev		device registered by devfreq class. dev.parent is the device
+ * @lock:	a mutex to protect accessing devfreq.
+ * @dev:	device registered by devfreq class. dev.parent is the device
  *		using devfreq.
- * @profile	device-specific devfreq profile
- * @governor	method how to choose frequency based on the usage.
- * @nb		notifier block used to notify devfreq object that it should
+ * @profile:	device-specific devfreq profile
+ * @governor:	method how to choose frequency based on the usage.
+ * @nb:		notifier block used to notify devfreq object that it should
  *		reevaluate operable frequencies. Devfreq users may use
  *		devfreq.nb to the corresponding register notifier call chain.
- * @work	delayed work for load monitoring.
- * @previous_freq	previously configured frequency value.
- * @data	Private data of the governor. The devfreq framework does not
+ * @work:	delayed work for load monitoring.
+ * @previous_freq:	previously configured frequency value.
+ * @data:	Private data of the governor. The devfreq framework does not
  *		touch this.
- * @min_freq	Limit minimum frequency requested by user (0: none)
- * @max_freq	Limit maximum frequency requested by user (0: none)
- * @stop_polling	 devfreq polling status of a device.
+ * @min_freq:	Limit minimum frequency requested by user (0: none)
+ * @max_freq:	Limit maximum frequency requested by user (0: none)
+ * @stop_polling:	 devfreq polling status of a device.
  *
  * This structure stores the devfreq information for a give device.
  *
···
 /**
  * struct devfreq_simple_ondemand_data - void *data fed to struct devfreq
  *	and devfreq_add_device
- * @ upthreshold	If the load is over this value, the frequency jumps.
+ * @upthreshold:	If the load is over this value, the frequency jumps.
  *			Specify 0 to use the default. Valid value = 0 to 100.
- * @ downdifferential	If the load is under upthreshold - downdifferential,
+ * @downdifferential:	If the load is under upthreshold - downdifferential,
  *			the governor may consider slowing the frequency down.
  *			Specify 0 to use the default. Valid value = 0 to 100.
  *			downdifferential < upthreshold must hold.