As part of change I83a13b1fcc6ca4350071a71648c7072c2b2a5191
("qcacld-3.0: Move few INIs's ownership from HDD to Policy manager")
support for the gEnableSAPManadatoryChanList INI item was moved to
Policy Manager, and the sap_mandatory_chnl_enable field in struct
policy_mgr_cfg now reflects the status of this INI item. The prior
mechanism, the enable_sap_mandatory_chan_list field in struct
policy_mgr_psoc_priv_obj, is no longer used, so remove it.
Change-Id: I1675257f2a4aac3ae34e934173415f9a4064618b
CRs-Fixed: 2379071