ar71xx: re-enable descriptor splitting on ar716x after the previous bugfixes (#13072)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 42429

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c

@@ -1262,12 +1262,10 @@ static int ag71xx_probe(struct platform_device *pdev)
 	ag->max_frame_len = pdata->max_frame_len;
 	ag->desc_pktlen_mask = pdata->desc_pktlen_mask;
 
-#ifdef notyet
 	if (!pdata->is_ar724x && !pdata->is_ar91xx) {
 		ag->tx_ring.desc_split = AG71XX_TX_RING_SPLIT;
 		ag->tx_ring.size *= AG71XX_TX_RING_DS_PER_PKT;
 	}
-#endif
 
 	ag->stop_desc = dma_alloc_coherent(NULL,
 		sizeof(struct ag71xx_desc), &ag->stop_desc_dma, GFP_KERNEL);