net/iavf: fix Tx debug

[ upstream commit 145b3f04a2971423c483c7f4cc00a7491668a893 ]

Commit 1e728b0 ("net/iavf: rework Tx path") reintroduced a check on
RTE_LIBRTE_IAVF_DEBUG_TX that has been dropped in favor of
RTE_ETHDEV_DEBUG_TX.

Fixes: 1e728b0 ("net/iavf: rework Tx path")

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

drivers/net/iavf/iavf_rxtx.c

@@ -2326,7 +2326,7 @@ iavf_fill_ctx_desc_segmentation_field(volatile uint64_t *field,
 			total_length -= m->outer_l3_len;
 	}
 
-#ifdef RTE_LIBRTE_IAVF_DEBUG_TX
+#ifdef RTE_ETHDEV_DEBUG_TX
 	if (!m->l4_len || !m->tso_segsz)
 		PMD_TX_LOG(DEBUG, "L4 length %d, LSO Segment size %d",
 			 m->l4_len, m->tso_segsz);