Input: gpio_keys - fix misnamed function parameter 'dev'

Fixes the following W=1 kernel build warning(s):

 drivers/input/keyboard/gpio_keys.c:119: warning: Function parameter or member 'dev' not described in 'get_bm_events_by_type'
 drivers/input/keyboard/gpio_keys.c:119: warning: Excess function parameter 'input' description in 'get_bm_events_by_type'
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201104162427.2984742-12-lee.jones@linaro.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/gpio_keys.c

@@ -108,7 +108,7 @@ static int get_n_events_by_type(int type)
 
 /**
  * get_bm_events_by_type() - returns bitmap of supported events per @type
- * @input: input device from which bitmap is retrieved
+ * @dev: input device from which bitmap is retrieved
  * @type: type of button (%EV_KEY, %EV_SW)
  *
  * Return value of this function can be used to allocate bitmap