[][MT7986-develop][synchronize DTs to make some drivers work]

[Description]
Add new dts settig to mt7986b.dtsi

[Release-log]
N/A

Change-Id: I9a6206d9928c1542e6ac78a59ad84a5b8672c536
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4675800
1 file changed