greybus: operation: fix atomic message submission

The recently added GFP-flags argument to gb_message_send was never used.

Fixes: 9218fac2a24d ("operation: allow atomic request submissions")
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/operation.c

@@ -200,7 +200,7 @@ static int gb_message_send(struct gb_message *message, gfp_t gfp)
 	return connection->hd->driver->message_send(connection->hd,
 					connection->hd_cport_id,
 					message,
-					GFP_KERNEL);
+					gfp);
 }
 
 /*