[][MT7986 develop][Add i2c and uart DT nodes for mt7986b]

[Description]
Add i2c/uart DT nodes for mt7986b

[Release-log]
N/A

Change-Id: I7d0246127ae09dbc3000a2edfbf37acef781bcc5
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5016615
1 file changed