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

[Description]
Refactor QDMA Per-Port-Per-Queue(PPPQ) mode:
	- Discard legacy CONFIG_NET_MEDIATEK_HW_QOS flag
	- Enable mtkhnat utility hqos=1 by default
	- Simplify qos_toggle command when enabling PPPQ

[Release-log]
N/A

Change-Id: Ia6ef6b7143af5f46d048525b931d02e2f81ded19
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5308043
10 files changed