qcacmn: Use objmgr API to get 1st vdev from pdev

If Vdev id is not present driver tries to get vdev with vdev id 0
from pdev. Vdev with vdev_id 0 might not be present on pdev so use
objmgr API wlan_objmgr_pdev_get_first_vdev to get the first vdev.

Change-Id: I2ae0d6056709339a8167582ec327269aa84c93f4
CRs-Fixed: 2349699

os_if/linux/scan/src/wlan_cfg80211_scan.c

@@ -1482,8 +1482,7 @@ QDF_STATUS wlan_abort_scan(struct wlan_objmgr_pdev *pdev,
 		return QDF_STATUS_E_FAILURE;
 	}
 	if (vdev_id == INVAL_VDEV_ID)
-		vdev = wlan_objmgr_get_vdev_by_id_from_pdev(pdev,
-				0, WLAN_OSIF_ID);
+		vdev = wlan_objmgr_pdev_get_first_vdev(pdev, WLAN_OSIF_ID);
 	else
 		vdev = wlan_objmgr_get_vdev_by_id_from_pdev(pdev,
 				vdev_id, WLAN_OSIF_ID);

umac/scan/dispatcher/src/wlan_scan_ucfg_api.c

@@ -2030,9 +2030,10 @@ ucfg_scan_cancel_pdev_scan(struct wlan_objmgr_pdev *pdev)
 		return QDF_STATUS_E_NOMEM;
 	}
 
-	vdev = wlan_objmgr_get_vdev_by_id_from_pdev(pdev, 0, WLAN_OSIF_ID);
+	vdev = wlan_objmgr_pdev_get_first_vdev(pdev, WLAN_SCAN_ID);
 	if (!vdev) {
 		scm_err("Failed to get vdev");
+		qdf_mem_free(req);
 		return QDF_STATUS_E_INVAL;
 	}
 	req->vdev = vdev;
@@ -2043,7 +2044,7 @@ ucfg_scan_cancel_pdev_scan(struct wlan_objmgr_pdev *pdev)
 	status = ucfg_scan_cancel_sync(req);
 	if (QDF_IS_STATUS_ERROR(status))
 		scm_err("Cancel scan request failed");
-	wlan_objmgr_vdev_release_ref(vdev, WLAN_OSIF_ID);
+	wlan_objmgr_vdev_release_ref(vdev, WLAN_SCAN_ID);
 
 	return status;
 }