HID: microsoft: no fallthrough in MS ergonomy 0xff05 usage

For 0xff05 usage in MS ergonomy keyboard quirk, we are falling through
and returning 0 instread of properly (because we've performed new mapping)
returning 1. Fix that.

Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
index 551795b..c6ef6eed 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -73,6 +73,7 @@
 		set_bit(KEY_F16, input->keybit);
 		set_bit(KEY_F17, input->keybit);
 		set_bit(KEY_F18, input->keybit);
+		break;
 	default:
 		return 0;
 	}