msm: kernel: rndis_ipa: set header removal value to meet Ethernet length

This change set the IPA header removal settings to meet
a full Etherent header.
This removal is required by IPA core to allow a generic
processing of Ipv4/6 packets.

Change-Id: Ibe6d5e2d5d22adcc169bfe7cc28b81223119f822
Signed-off-by: Talel Atias <tatias@codeaurora.org>