qcacmn: Fix error in check against max vdev for a pdev

The current implementation allows one extra vdev
to be created than the max vdevs allowed for a pdev.

Correct the check to allow only max vdevs to be created
for a pdev.

Change-Id: I589ae204abe87f5a727489494a34807a45d501fa
CRs-Fixed: 2415783

umac/cmn_services/obj_mgr/src/wlan_objmgr_pdev_obj.c

@@ -586,7 +586,7 @@ QDF_STATUS wlan_objmgr_pdev_vdev_attach(struct wlan_objmgr_pdev *pdev,
 
 	wlan_pdev_obj_lock(pdev);
 	/* If Max vdev count exceeds, return failure */
-	if (objmgr->wlan_vdev_count > objmgr->max_vdev_count) {
+	if (objmgr->wlan_vdev_count >= objmgr->max_vdev_count) {
 		wlan_pdev_obj_unlock(pdev);
 		return QDF_STATUS_E_FAILURE;
 	}