net: ethernet: mtk_eth_soc: remove unneeded semicolon

Eliminate the following coccicheck warning:
 drivers/net/ethernet/mediatek/mtk_ppe.c:270:2-3: Unneeded semicolon
Signed-off-by: NQiheng Lin <linqiheng@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mediatek/mtk_ppe.c

@@ -267,7 +267,7 @@ int mtk_foe_entry_set_ipv6_tuple(struct mtk_foe_entry *entry,
 	default:
 		WARN_ON_ONCE(1);
 		return -EINVAL;
-	};
+	}
 
 	for (i = 0; i < 4; i++)
 		src[i] = be32_to_cpu(src_addr[i]);