greybus: svc: Use 'dev' instead '&op->connection->dev'

We already have a variable to access '&op->connection->dev' directly,
lets reuse it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Jean Pihet <jean.pihet@newoldbits.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/svc.c

@@ -469,8 +469,7 @@ static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op)
 	u8 intf_id;
 
 	if (request->payload_size < sizeof(*hot_unplug)) {
-		dev_err(&op->connection->dev,
-			"short hot unplug request received (%zu < %zu)\n",
+		dev_err(dev, "short hot unplug request received (%zu < %zu)\n",
 			request->payload_size, sizeof(*hot_unplug));
 		return -EINVAL;
 	}