Input: adp5588-keys - use the right header

This keyboard driver is implementing a GPIO driver, so it need
to include <linux/gpio/driver.h> and not the legacy <linux/gpio.h>
header.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210820222958.57238-1-linus.walleij@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/adp5588-keys.c

@@ -17,7 +17,7 @@
 #include <linux/platform_device.h>
 #include <linux/input.h>
 #include <linux/i2c.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/slab.h>
 
 #include <linux/platform_data/adp5588.h>