qcacld-3.0: Convert legacy chan ID usage to chan freq

Modify the following API's code and parameters to make
sure it is using frequency instead of channel ID:
   sme_get_connected_roaming_vdev_band

Change enum band_info band field in struct set_pcl_req
to uint32_t band_mask

Change-Id: I8ad6fc2676c2306043aa9415eefb2b89d8c49a4d
CRs-Fixed: 2555041
3 files changed