[][Add QDMA Per-Port-Per-Queue(PPPQ) mode]

[Description]
Add Panther QDMA Per-Port-Per-Queue(PPPQ) mode for solving
uplink pause frame issue.

After enabling PPPQ mode, each LAN port will be mapped into
a specified QDMA queue.

[Usage]
- echo 2 > /sys/kernel/debug/hnat/qos_toggle	(PPPQ Mode)
- echo 1 > /sys/kernel/debug/hnat/qos_toggle	(HQoS Mode)
- echo 0 > /sys/kernel/debug/hnat/qos_toggle	(Disable QDMA)

[Release-log]
N/A

Change-Id: Ic554bce717d6384cbb31a4c44cdc7988e82719e7
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5288809
6 files changed