[][SW should not enable UDP_IP4F_NAT_EN]

[Description]
Remove useless flag, SW should not enable UDP_IP4F_NAT_EN in hnat_start.
HW not support UDP_IP4F_NAT_EN, when receive UDP fragement pkts,
recalculate udp checksum incorrect.

[Release-log]
N/A

Change-Id: Ia56b12845d7be9962ca58762c0657c3231872c13
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5843691
diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat.c b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat.c
index 58a83b8..68aad32 100644
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat.c
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat.c
@@ -351,7 +351,7 @@
 
 	/* enable FOE */
 	cr_set_bits(hnat_priv->ppe_base[ppe_id] + PPE_FLOW_CFG,
-		    BIT_UDP_IP4F_NAT_EN | BIT_IPV4_NAT_EN | BIT_IPV4_NAPT_EN |
+		    BIT_IPV4_NAT_EN | BIT_IPV4_NAPT_EN |
 		    BIT_IPV4_NAT_FRAG_EN | BIT_IPV4_HASH_GREK |
 		    BIT_IPV4_DSL_EN | BIT_IPV6_6RD_EN |
 		    BIT_IPV6_3T_ROUTE_EN | BIT_IPV6_5T_ROUTE_EN);