Ensure that the 6 GHz AP criteria (RSN parameters) are met before
selecting the ACS candidate channels. Currently, hostapd includes 6 GHz
channels as ACS candidates. However, if the BSS configuration does not
comply with 6 GHz AP criteria, ACS might inadvertently start an 6 GHz AP
with configuration that does not meet RSN configuration requirements for
the 6 GHz band.
Add a validation step to check 6 GHz AP criteria before ACS candidates
channel selection.