Two mlo sta link vdev (2+6(LPI)) are started but hw mode is SMM (one
link maybe inactive in fw).
When start SAP on 5 GHz low, driver doesn't select force SCC channel for
such case. It left the SAP channel not changed (5 GHz 5220).
Since the 6 GHz STA link is on LPI mode, SAP is not allowed on
6 GHz (policy_mgr_modify_sap_pcl_for_6G_channels). Driver needs to
consider the PCL as well to select force SCC channel. Add new API
policy_mgr_get_pref_force_scc_freq to fix it.
Change-Id: I824de7168a26955caeeaff955a232c80baa13345
CRs-Fixed: 3280704
343b2e8d9e