Previously 4 SAP PCL table only check 3 SAP in DBS mode,
it is not applicable if SBS mode available, for example if SAP1/SAP2
on channel 5805 and SAP3 on channel 5220 in SBS mode, if SAP4 start
on channel 2.4 GHz, it will be rejected.
Move policy_mgr_get_index_for_3_given_freq_dbs() and
policy_mgr_get_index_for_3_given_freq_sbs() out of macro
WLAN_FEATURE_11BE_MLO, so it can be reused by 4 SAP case.
Use above APIs to get common four connection PCL table index
and remove exist four SAP connection PCL index.
Change-Id: I7a8a3e6736feaae139e2c81050f00b2078df371e
CRs-Fixed: 3500354
f7c7264840