qcacmn: Add a Regulatory API to compute channel list after HW Mode Switch

Add regulatory API and a dispatcher function to compute current channel
list after dynamic HW Mode Switch. range_5g_low, range_5g_high and wireless
modes are extracted from wlan_psoc_host_mac_phy_caps based on the new
HW mode configured and are used to derive the current channel list.

Change-Id: I799712da8992ede0b5896dd2eb438cffea5fe048
CRs-Fixed: 2481535
4 files changed