Update LWIP

> Enable LWIP socket functionality
> FIQ and protection control

diff --git a/lwip b/lwip
index 63e027c4149306e4aa41410d358c0322a6525a4b..a0ca9096ba6efd2c39687355a5e6f25eabea4747 160000 (submodule)
--- a/lwip
+++ b/lwip
@@ -1 +1 @@
-Subproject commit 63e027c4149306e4aa41410d358c0322a6525a4b
+Subproject commit a0ca9096ba6efd2c39687355a5e6f25eabea4747