wlan:Set reg treament as per reg domain change.

Currently when last reg request initiator is user
and current reg request initiator is driver,kernel
gives reg request treatment as REG_REQ_INTERSECT,even
if the country is same for both previous and currennt
request.As a part of fix,made changes such that if
country is same,treatement would be REG_REQ_ALREADY_SET.

Change-Id: I564550df0aeb6214975c6bf3688fdbd6c5fa239c
CRs-Fixed: 767046
Signed-off-by: Kaushik, Sushant <skaushik@codeaurora.org>