Update Linux to v5.10.109

Sourced from [1]

[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz

Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/net/ipv4/udp_tunnel_stub.c b/net/ipv4/udp_tunnel_stub.c
new file mode 100644
index 0000000..c4b2888
--- /dev/null
+++ b/net/ipv4/udp_tunnel_stub.c
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2020 Facebook Inc.
+
+#include <net/udp_tunnel.h>
+
+const struct udp_tunnel_nic_ops *udp_tunnel_nic_ops;
+EXPORT_SYMBOL_GPL(udp_tunnel_nic_ops);