In sap_update_rssi_bsscount, bss count for channels is
incremented based on offset only and does not consider
if channel on which scan result is received and the
offset channel belong to same band. This could result
in incorrect increment of bss count for some channels
when channels from both bands are present.
Fix is to increment bss count based on channel offset
only if both channels belong to same band and also
choose channel with lower bss count among the channels
having least weight.
Change-Id: Icee978fc40047782c79fe36cba29e3feed3c90aa
CRs-Fixed: 2191324
273889e7cc