Input: drv260x - fix kernel-doc formatting and remove one abuse

Input: drv260x - fix kernel-doc formatting and remove one abuse

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

 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'input_dev' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'client' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'regmap' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'work' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'enable_gpio' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'regulator' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'magnitude' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'mode' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'library' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'rated_voltage' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:194: warning: Function parameter or member 'overdrive_voltage' not described in 'drv260x_data'
 drivers/input/misc/drv260x.c:244: warning: Function parameter or member 'voltage' not described in 'drv260x_calculate_voltage'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201104162427.2984742-17-lee.jones@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>