Check mandatory freq for SAP only if STA is present.
Also allow SAP on a freq which can lead to SBS with STA freq and is
in mandatory freq list, if gWlanMccToSccSwitchMode is set to
QDF_MCC_TO_SCC_SWITCH_WITH_FAVORITE_CHANNEL.
Allow ML SAP (SAP+SAP) on valid channels if gWlanMccToSccSwitchMode
is QDF_MCC_TO_SCC_SWITCH_WITH_FAVORITE_CHANNEL.
As QDF_MCC_TO_SCC_SWITCH_WITH_FAVORITE_CHANNEL is only valid for
STA+SAP case.
So if STA is not present skip the mandatory freq and allow ML SAP
on original freq.
Change-Id: I6e8cbc7f944b2fa99c1449c288b9593cc4ad9454
CRs-Fixed: 3114208
5247ffb1e1