[][SW should not fill KA field]

[Description]
Remove useless operation, SW should not fill KA field.
This field is a display of keepalive for each packet.
KA is 1 means that the packet will be sent to the CPU
for keepalive conntrack,
and KA is 0 means that the packet will not be sent to CPU.

[Release-log]
N/A

Change-Id: Iaf7fea6e6fdfc4e8fa024c38dc2b4ddf65ff9f54
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5823778
diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
index 292cf19..8d199ef 100644
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_hnat/hnat_nf_hook.c
@@ -1027,7 +1027,6 @@
 	entry.bfib1.vpm = (entry.bfib1.vlan_layer) ? 1 : 0;
 	entry.bfib1.ttl = 1;
 	entry.bfib1.cah = 1;
-	entry.bfib1.ka = 1;
 	entry.bfib1.time_stamp = (hnat_priv->data->version == MTK_HNAT_V4) ?
 		readl(hnat_priv->fe_base + 0x0010) & (0xFF) :
 		readl(hnat_priv->fe_base + 0x0010) & (0x7FFF);