mfd: Fix missing stmpe kerneldoc

Generating kerneldoc for STMPE result in warnings, so fix this by
adding missing documentation.

Signed-off-by: Om Prakash <[e-mail]>
Reviewed-by: Rabin Vincent <[e-mail]>
Reviewed-by: Jonas Aberg <[e-mail]>
Reviewed-by: Srinidhi Kasagar <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/mfd/stmpe.c

···
 EXPORT_SYMBOL_GPL(stmpe_block_write);
 
 /**
- * stmpe_set_altfunc: set the alternate function for STMPE pins
+ * stmpe_set_altfunc()- set the alternate function for STMPE pins
  * @stmpe:	Device to configure
  * @pins:	Bitmask of pins to affect
  * @block:	block to enable alternate functions for

drivers/mfd/stmpe.h

···
  * @id_mask:	bits valid in CHIPID register for comparison with id_val
  * @num_gpios:	number of GPIOS
  * @af_bits:	number of bits used to specify the alternate function
+ * @regs: variant specific registers.
  * @blocks:	list of blocks present on this device
  * @num_blocks:	number of blocks present on this device
  * @num_irqs:	number of internal IRQs available on this device

include/linux/mfd/stmpe.h

···
  * @irq_lock: IRQ bus lock
  * @dev: device, mostly for dev_dbg()
  * @i2c: i2c client
+ * @partnum: part number
  * @variant: the detected STMPE model number
  * @regs: list of addresses of registers which are at different addresses on
  *	  different variants.  Indexed by one of STMPE_IDX_*.
···
  * @norequest_mask: bitmask specifying which GPIOs should _not_ be
  *		    requestable due to different usage (e.g. touch, keypad)
  *		    STMPE_GPIO_NOREQ_* macros can be used here.
+ * @setup: board specific setup callback.
+ * @remove: board specific remove callback
  */
 struct stmpe_gpio_platform_data {
 	int gpio_base;