[ARM] Orion: enable KEYBOARD_GPIO in the defconfg

Enable KEYBOARD_GPIO in the Orion defconfig because a number of Orion
devices, such as the HP mv2120, define gpio-keys buttons.
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

arch/arm/configs/orion5x_defconfig

@@ -757,7 +757,14 @@ CONFIG_INPUT_EVDEV=y
 #
 # Input Device Drivers
 #
-# CONFIG_INPUT_KEYBOARD is not set
+CONFIG_INPUT_KEYBOARD=y
+# CONFIG_KEYBOARD_ATKBD is not set
+# CONFIG_KEYBOARD_SUNKBD is not set
+# CONFIG_KEYBOARD_LKKBD is not set
+# CONFIG_KEYBOARD_XTKBD is not set
+# CONFIG_KEYBOARD_NEWTON is not set
+# CONFIG_KEYBOARD_STOWAWAY is not set
+CONFIG_KEYBOARD_GPIO=y
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_INPUT_JOYSTICK is not set
 # CONFIG_INPUT_TABLET is not set