Add a check in mec handler to see if mac_address is same as that of
vdev_macaddr.raw. If both mac addresses are equal, then add_wds_entry should
not be called. This corner case is seen in qwrap mode where the vdev address
is same as that of the backend wired station
Change-Id: I17504de8ef379680c2a2b962280e1853a5b2930d
CRs-fixed: 2109554