Input: add KEY_BATTERY keycode

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/include/linux/input.h b/include/linux/input.h
index 50e338d..14036ee 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -345,6 +345,8 @@
 #define KEY_SAVE		234
 #define KEY_DOCUMENTS		235
 
+#define KEY_BATTERY		236
+
 #define KEY_UNKNOWN		240
 
 #define BTN_MISC		0x100