Input: make input_register_handler() return error codes

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/power.c b/drivers/input/power.c
index 75d0187..ee82464 100644
--- a/drivers/input/power.c
+++ b/drivers/input/power.c
@@ -150,8 +150,7 @@
 
 static int __init power_init(void)
 {
-	input_register_handler(&power_handler);
-	return 0;
+	return input_register_handler(&power_handler);
 }
 
 static void __exit power_exit(void)