wlan: Enable ARP offload config

Enable ARP offload configuration for WLAN driver.

Change-Id: I52fc51bd29ea01c01da02fc188218ffb79958da6
CRs-fixed: 455310

author	Sameer Thalappil <sameert@qca.qualcomm.com>
Fri, 22 Feb 2013 00:08:43 +0000 (16:08 -0800)
committer	Gopichand Nakkala <gnakkala@qca.qualcomm.com>
Tue, 26 Feb 2013 07:44:38 +0000 (23:44 -0800)

ported from
https://www.codeaurora.org/gitweb/external/wlan/?p=prima.git;a=commitdiff;h=c0ed3819ab067034ba7a920aadd470fe9db5b1e8

Signed-off-by: SkipXS <sskkiipp@gmail.com>