qcacld-3.0: Address corner scenarios for dual sta roaming

Address below corner scenarios for dual sta roaming:

1. Initialize primary interface vdev id
with WLAN_UMAC_VDEV_ID_MAX.

2. Enable roaming while processing set primary interface
vendor command irrespective of dual sta roam policy.

3. Disable mcc_adaptive_scheduler before sending
WMI_RESMGR_ADAPTIVE_OCS_ENABLE_DISABLE_CMDID to FW and
enable it if host receives dual sta policy as unbiased.

Change-Id: I8e5254c6f9053bd5fe7f925af4b577e76c9b9a2e
CRs-Fixed: 2928870

components/mlme/dispatcher/inc/wlan_mlme_ucfg_api.h

@@ -1198,6 +1198,15 @@ QDF_STATUS
 ucfg_mlme_get_roam_bmiss_final_bcnt(struct wlan_objmgr_psoc *psoc,
 				    uint8_t *val);
 
+/**
+ * ucfg_mlme_get_dual_sta_roaming_enabled() - Get dual sta roaming enable flag
+ * @psoc: pointer to psoc object
+ *
+ * Return: true if dual sta roaming allowed in fw
+ */
+bool
+ucfg_mlme_get_dual_sta_roaming_enabled(struct wlan_objmgr_psoc *psoc);
+
 /**
  * ucfg_mlme_get_roam_bmiss_first_bcnt() - Get roam bmiss final count
  * @psoc: pointer to psoc object