[][Refactor and sync mt7986 config-5.4]

[Description]
Refactor and sync mt7986 config-5.4

[Release-log]
N/A

Change-Id: I176116aae76fe9526ccb441d6daaecc0d70d7a8c
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4748999
1 file changed