qcacmn: Consistently use policy_mgr_dual_mac_config

Remove duplicate structs wmi_dual_mac_config and sir_dual_mac_config
and use policy_mgr_dual_mac_config.

Change-Id: I6da6539f519ec46ee274ba3f3ae042e5fd9c25d2
CRs-Fixed: 2191031
7 files changed