esoc: Add snapshot of esoc driver

This is a snapshot of the esoc driver as of msm-4.14 commit
<55e5efd553c10ef>. (Merge "nl80211: Fix external_auth check
for offloaded authentication")

Change-Id: Id47bcba3a5342986c3496707eb1e7cec03f19e3b
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>