[][MAC80211][mt7986][hnat][Add hw configuration for PPE]

[Description]
Add hardware configuration for PPE MCAST_TB_EN.

If without this patch, hardware might possibly generate
the kind of unexpected descriptor which is tagged with
0x18 cpu reason, and then ADMA CDM1 won't know how to
process it.

[Release-log]
N/A


Change-Id: Ifc82ef9ca5e17e5e2fe1e6383f5baa9d1b98c6f0
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7972393
diff --git a/autobuild_mac80211_release/target/linux/mediatek/patches-5.4/999-3003-mt7622-backport-nf-hw-offload-framework-and-ups.patch b/autobuild_mac80211_release/target/linux/mediatek/patches-5.4/999-3003-mt7622-backport-nf-hw-offload-framework-and-ups.patch
index b52782f..9ccf9ce 100755
--- a/autobuild_mac80211_release/target/linux/mediatek/patches-5.4/999-3003-mt7622-backport-nf-hw-offload-framework-and-ups.patch
+++ b/autobuild_mac80211_release/target/linux/mediatek/patches-5.4/999-3003-mt7622-backport-nf-hw-offload-framework-and-ups.patch
@@ -237,7 +237,7 @@
 index 000000000..66298e223
 --- /dev/null
 +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
-@@ -0,0 +1,509 @@
+@@ -0,0 +1,510 @@
 +// SPDX-License-Identifier: GPL-2.0-only
 +/* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
 +
@@ -714,6 +714,7 @@
 +	val = MTK_PPE_GLO_CFG_EN |
 +	      MTK_PPE_GLO_CFG_IP4_L4_CS_DROP |
 +	      MTK_PPE_GLO_CFG_IP4_CS_DROP |
++	      MTK_PPE_GLO_CFG_MCAST_TB_EN |
 +	      MTK_PPE_GLO_CFG_FLOW_DROP_UPDATE;
 +	ppe_w32(ppe, MTK_PPE_GLO_CFG, val);
 +