qcacld-3.0: Add 6GHz support for VENDOR_SUBCMD_EXTERNAL_ACS

As a part of 6GHz support, add support to parse and send channel
frequency (in MHz) in QCA_NL80211_VENDOR_SUBCMD_EXTERNAL_ACS
command/event data.

Change-Id: I87879b4f8dd6a5c4ded2e89c527ba91432c9c48a
CRs-Fixed: 2533732
2 files changed