qcacld-3.0: Check channel number if there is SAP/GO

Driver will reject with channel 0 when check channel ok for DNBS,
without this fix, wlan_cfg80211_mgmt_tx API will fail when channel is zero.

Change-Id: I89edc81c45104d0994cd65262c1f5545f0f6970f
CRs-Fixed: 2476420

components/cmn_services/policy_mgr/src/wlan_policy_mgr_get_set_utils.c

@@ -3059,7 +3059,7 @@ QDF_STATUS policy_mgr_is_chan_ok_for_dnbs(struct wlan_objmgr_psoc *psoc,
 	uint8_t vdev_id[MAX_NUMBER_OF_CONC_CONNECTIONS];
 	struct wlan_objmgr_vdev *vdev;
 
-	if (!channel || !ok) {
+	if (!ok) {
 		policy_mgr_err("Invalid parameter");
 		return QDF_STATUS_E_INVAL;
 	}
@@ -3080,6 +3080,11 @@ QDF_STATUS policy_mgr_is_chan_ok_for_dnbs(struct wlan_objmgr_psoc *psoc,
 		return QDF_STATUS_SUCCESS;
 	}
 
+	if (!channel) {
+		policy_mgr_err("channel is 0, cc count %d", cc_count);
+		return QDF_STATUS_E_INVAL;
+	}
+
 	for (i = 0; i < cc_count; i++) {
 		vdev = wlan_objmgr_get_vdev_by_id_from_psoc(psoc,
 							vdev_id[i],