docs: update pin-control.rst references

Changeset 5513b411ea5b ("Documentation: rename pinctl to pin-control")
renamed: Documentation/driver-api/pinctl.rst
to: Documentation/driver-api/pin-control.rst.

Update the cross-references accordingly.

Fixes: 5513b411ea5b ("Documentation: rename pinctl to pin-control")
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>
Acked-by: Charles Keepax <[e-mail]>
Acked-by: Lee Jones <[e-mail]>
Link: https://lore.kernel.org/r/46ac2e[e-mail]
Signed-off-by: Jonathan Corbet <[e-mail]>

include/linux/device.h

···
  * 		along with subsystem-level and driver-level callbacks.
  * @em_pd:	device's energy model performance domain
  * @pins:	For device pin management.
- *		See Documentation/driver-api/pinctl.rst for details.
+ *		See Documentation/driver-api/pin-control.rst for details.
  * @msi_list:	Hosts MSI descriptors
  * @msi_domain: The generic MSI domain this device is using.
  * @numa_node:	NUMA node this device is close to.

include/linux/mfd/madera/pdata.h

···
  * @irq_flags:	    Mode for primary IRQ (defaults to active low)
  * @gpio_base:	    Base GPIO number
  * @gpio_configs:   Array of GPIO configurations (See
- *		    Documentation/driver-api/pinctl.rst)
+ *		    Documentation/driver-api/pin-control.rst)
  * @n_gpio_configs: Number of entries in gpio_configs
  * @gpsw:	    General purpose switch mode setting. Depends on the external
  *		    hardware connected to the switch. (See the SW1_MODE field

include/linux/pinctrl/pinconf-generic.h

···
  * 	it.
  * @PIN_CONFIG_OUTPUT: this will configure the pin as an output and drive a
  * 	value on the line. Use argument 1 to indicate high level, argument 0 to
- *	indicate low level. (Please see Documentation/driver-api/pinctl.rst,
+ *	indicate low level. (Please see Documentation/driver-api/pin-control.rst,
  *	section "GPIO mode pitfalls" for a discussion around this parameter.)
  * @PIN_CONFIG_PERSIST_STATE: retain pin state across sleep or controller reset
  * @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power