greybus: svc: use macro for init and exit protocol

Change to gb_gpbridge_protocol_driver for
making the consitent with other drivers.
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/svc.c

@@ -245,12 +245,4 @@ static struct gb_protocol svc_protocol = {
 	.request_recv		= gb_svc_request_recv,
 };
 
-int gb_svc_protocol_init(void)
-{
-	return gb_protocol_register(&svc_protocol);
-}
-
-void gb_svc_protocol_exit(void)
-{
-	gb_protocol_deregister(&svc_protocol);
-}
+gb_gpbridge_protocol_driver(svc_protocol);