qcacmn: Use atomic variant of qdf_mem_malloc for vdev stats

Use qdf_mem_malloc_atomic for memory allocation while fetching
vdev stats.

Change-Id: Ia36a41deb5ba882adb0727538c085c33c7e38b7c
CRs-Fixed: 3097703

dp/wifi3.0/dp_main.c

@@ -8478,7 +8478,7 @@ static QDF_STATUS dp_vdev_getstats(struct cdp_vdev *vdev_handle,
 
 	soc = pdev->soc;
 
-	vdev_stats = qdf_mem_malloc(sizeof(struct cdp_vdev_stats));
+	vdev_stats = qdf_mem_malloc_atomic(sizeof(struct cdp_vdev_stats));
 
 	if (!vdev_stats) {
 		dp_cdp_err("%pK: DP alloc failure - unable to get alloc vdev stats",