Cherrypicks from the latest tegra 2.6.39.4 repo

- (netfilter) Start tracking iface rx/tx at low level
- (netfilter) Add new netlink msg type
- (netfilter) Fix ipv6 protocol lookup
- (VFP) Updated VFP module
- (ADB) Only enable gadget when adbd is ready
- (ARM v7) Remove HARVARD_GUARD preprocessor guard
- (USB) RNDIS touch-ups
- (PM) Disallow lp2 while hotplugging in suspend
- (L2X0) Clean cache when disabling L2
- (L2X0) Add save and restore functions
- (VIDEO) Convert channelopen kzalloc to vzalloc to avoid large
physically contiguous allocations
at runtime.
- (EXT4) Add missing save_error_info() to ext4_error()