[] [Add auxadc dtsi node]

[Description]
Add auxadc dtsi node

[Release-log]
N/A

Change-Id: I68e7618c9abeefcdd5b4f54b388d8f056b2ff3bb
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4564855
3 files changed