greybus: svc: driver is basic to Greybus (not GP Bridge)

The SVC protocol driver should have been defined as a basic
Greybus protocol driver, not a GP Bridge protocol driver.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/svc.c

@@ -245,4 +245,4 @@ static struct gb_protocol svc_protocol = {
 	.request_recv		= gb_svc_request_recv,
 };
 
-gb_gpbridge_protocol_driver(svc_protocol);
+gb_protocol_driver(&svc_protocol);