Input: add KEY_WPS_BUTTON definition

The new key definition is supposed to be used for buttons that initiate
WiFi Protected setup sequence:

	http://en.wikipedia.org/wiki/Wi-Fi_Protected_Setup

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/include/linux/input.h b/include/linux/input.h
index 8dc5d72..828c3fe 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -596,6 +596,7 @@
 #define KEY_NUMERIC_POUND	0x20b
 
 #define KEY_CAMERA_FOCUS	0x210
+#define KEY_WPS_BUTTON		0x211	/* WiFi Protected Setup key */
 
 /* We avoid low common keys in module aliases so they don't get huge. */
 #define KEY_MIN_INTERESTING	KEY_MUTE