The touchscreen device is a GPIO consumer, not a GPIO controller,
so there is no need to include <linux/gpio.h>.

Remove the unneeded header file.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20191026185958.24158-1-festevam@gmail.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>