qcacld-3.0: Allow roaming to configured roaming band only

Here upper layer configures roam band via the SETROAMBAND
NCHO command. This means DUT should be restricted to roam
to the configured band only but as per current PCL filtration
logic, DUT is allowed to roam beyond the configured band AP
also. Roam Band definition is:
0: auto (all supported bands)
1: 2.4 only
2: 5 only
3: 2.4 + 5
4: 6 only
5: 2.4 + 6
6: 5 + 6
7: 2.4 + 5 + 6

Fix is to update the PCL filtration logic in wma_send_set_pcl_cmd
and make sure DUT doesn't roam beyond the configured band AP.

Change-Id: Ia2353e8ff982609a4ab5a35715886648f140cd22
CRs-Fixed: 3158456