[PORT FROM R2]WLAN: Back ported netfilter support into the kernel

[PORT FROM R2]WLAN: Back ported netfilter support into the kernel

BZ: 17679 18653 17927 17650

This is a port of netfiltering support from the r2-gingerbread kernel sha1: d47dfdc1307cc6a68c1ba6d51b14f0dd3f1098dd
Wifi tethering was failing because the kernel was not supporting the netfiltering.
With this patch, the netfilering support is put it back.

Change-Id: Ia208b5dd36cee9607c8983ad2e2f11f95501f6f2
Orig-Change-Id: Ia208b5dd36cee9607c8983ad2e2f11f95501f6f2
Signed-off-by: Marco Sinigaglia <marcox.sinigaglia@intel.com>
Reviewed-on: http://android.intel.com:8080/31171
Reviewed-by: Regairaz, JulieX <juliex.regairaz@intel.com>
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Tested-by: Champciaux, NicolasX <nicolasx.champciaux@intel.com>
Reviewed-by: Marotte, Fabien <fabien.marotte@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>