qcacld-3.0: Properly check return value of lim_cmp_ssid
lim_cmp_ssid() calls qdf_mem_cmp() and a return value of 0
means the memory to be compared are equal.
In lim_chk_ssid(), checking against != true is thus not
proper to ensure memory are equal. Thus check against
0 to ensure requested SSID matches our own SSID configured.
Change-Id: I31651e7fba47ae6eb22dc034c4479114343e8652
CRs-Fixed: 2765570