net/iavf: remove log from Tx prepare function

[ upstream commit 4015aed58aefb3cceba6766f1fcaaa483c21ede0 ]

iavf_prep_pkts reports to the application that the packet is invalid
(from the driver pov). Having a log message only in this branch is not
consistent with all other checks in this function and it may slow down
the application if such invalid packets are being sent continuously.

Fixes: 19ee91c ("net/iavf: check illegal packet sizes")

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/iavf/iavf_rxtx.c

@@ -2819,7 +2819,6 @@ iavf_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
 		if (m->data_len < IAVF_TX_MIN_PKT_LEN ||
 			m->data_len > max_frame_size) {
 			rte_errno = EINVAL;
-			PMD_DRV_LOG(ERR, "INVALID mbuf: bad data_len=[%hu]", m->data_len);
 			return i;
 		}