qcacld-3.0: Add pointer sanity check for mac context

Add pointer sanity check for mac context in wma_send_peer_assoc_req
as cds_get_context may return Null for mac context

Change-Id: I75a54d728f2c276a9aeeb1ee7d8ea46180540ac8
CRs-Fixed: 2706149
1 file changed