pktgen: Remove unnecessary prefix from pr_<level>

Remove "pktgen: " prefix string from one pr_info.
pr_fmt adds it, so this is a duplicate.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/pktgen.c

@@ -3553,8 +3553,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
 		break;
 	default: /* Drivers are not supposed to return other values! */
 		if (net_ratelimit())
-			pr_info("pktgen: %s xmit error: %d\n",
-				pkt_dev->odevname, ret);
+			pr_info("%s xmit error: %d\n", pkt_dev->odevname, ret);
 		pkt_dev->errors++;
 		/* fallthru */
 	case NETDEV_TX_LOCKED: