net: lantiq_etop: add blank line after declaration

This patch adds a missing line after the declaration and
fixes the checkpatch warning:

WARNING: Missing a blank line after declarations
+		int desc;
+		for (desc = 0; desc < LTQ_DESC_NUM; desc++)

Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Link: https://lore.kernel.org/r/20211228220031.71576-1-olek2@wp.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/lantiq_etop.c

@@ -218,6 +218,7 @@ ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch)
 		free_irq(ch->dma.irq, priv);
 	if (IS_RX(ch->idx)) {
 		int desc;
+
 		for (desc = 0; desc < LTQ_DESC_NUM; desc++)
 			dev_kfree_skb_any(ch->skb[ch->dma.desc]);
 	}