dm355evm_keys rm extra header

Remove a header inclusion that was accidentaly
left over from debugging.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

drivers/input/keyboard/dm355evm_keys.c

@@ -37,8 +37,6 @@ struct dm355evm_keys {
 	int			irq;
 };
 
-#include <linux/gpio.h>
-
 static irqreturn_t dm355evm_keys_irq(int irq, void *_keys)
 {
 	struct dm355evm_keys	*keys = _keys;