Revert "defconfig: cleaning up NET related configs for LW"

This reverts commit 7c4059a4
since it is buggy and removes polciy based routing related
configs causing issues with basic data call and wifi bring-up.

Change-Id: I13b8062145026bee8fee46c1a778fa82a33ce0b5
Signed-off-by: Ashwanth Goli <ashwanth@codeaurora.org>