net: fec: add statistics for XDP_TX

The FEC driver supports the statistics for XDP actions except for
XDP_TX before, because the XDP_TX was not supported when adding
the statistics for XDP. Now the FEC driver has supported XDP_TX
since commit f601899e ("net: fec: add XDP_TX feature support").
So it's reasonable and necessary to add statistics for XDP_TX.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec_main.c

@@ -1590,9 +1590,12 @@ fec_enet_run_xdp(struct fec_enet_private *fep, struct bpf_prog *prog,
 		break;
 
 	case XDP_TX:
+		rxq->stats[RX_XDP_TX]++;
 		err = fec_enet_xdp_tx_xmit(fep, cpu, xdp, sync);
-		if (unlikely(err))
+		if (unlikely(err)) {
+			rxq->stats[RX_XDP_TX_ERRORS]++;
 			goto xdp_err;
+		}
 
 		ret = FEC_ENET_XDP_TX;
 		break;