eth: gve: add missing netdev locks on reset and shutdown paths

All the misc entry points end up calling into either gve_open()
or gve_close(), they take rtnl_lock today but since the recent
instance locking changes should also take the instance lock.

Found by code inspection and untested.

Fixes: cae03e5 ("net: hold netdev instance lock during queue operations")
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Link: https://patch.msgid.link/20250328164742.1268069-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: kuba-moo

drivers/net/ethernet/google/gve/gve_main.c

@@ -2077,7 +2077,9 @@ static void gve_handle_reset(struct gve_priv *priv)
 
 	if (gve_get_do_reset(priv)) {
 		rtnl_lock();
+		netdev_lock(priv->dev);
 		gve_reset(priv, false);
+		netdev_unlock(priv->dev);
 		rtnl_unlock();
 	}
 }
@@ -2714,13 +2716,15 @@ static void gve_shutdown(struct pci_dev *pdev)
 	bool was_up = netif_running(priv->dev);
 
 	rtnl_lock();
+	netdev_lock(netdev);
 	if (was_up && gve_close(priv->dev)) {
 		/* If the dev was up, attempt to close, if close fails, reset */
 		gve_reset_and_teardown(priv, was_up);
 	} else {
 		/* If the dev wasn't up or close worked, finish tearing down */
 		gve_teardown_priv_resources(priv);
 	}
+	netdev_unlock(netdev);
 	rtnl_unlock();
 }