net: stmmac: ratelimit RX error logs

Ratelimit RX error logs.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -3433,6 +3433,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
 			 *  ignored
 			 */
 			if (frame_len > priv->dma_buf_sz) {
+				if (net_ratelimit())
 					netdev_err(priv->dev,
 						   "len %d larger than size (%d)\n",
 						   frame_len, priv->dma_buf_sz);
@@ -3492,6 +3493,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
 			} else {
 				skb = rx_q->rx_skbuff[entry];
 				if (unlikely(!skb)) {
+					if (net_ratelimit())
 						netdev_err(priv->dev,
 							   "%s: Inconsistent Rx chain\n",
 							   priv->dev->name);