qcacmn: Add API to get 2GHz/5GHz freq range and wireless modes

Offload layer uses low and high 2GHz/5GHz freq ranges and chip
supported wireless modes to populate umac ic channel list.

Change-Id: I899edd83548d68e67659b3a9273ddaaaf740540b
CRs-Fixed: 2047212
8 files changed