qcacmn: Add API to get current regdomain

Add API to get regdomain pair ID, 2GHz/5GHz regdomain,
2GHz/5GHz ctl values and dfs domain. For Partial-offload,
during country code change HOST sends these values to FW.

Change-Id: I718813d7559ea1564e0952221a881589c6f3cd0d
CRs-Fixed: 2058130
6 files changed