[][mt7981: uart clock integration]

[Description]
Change to configure uart clock in dtsi file.

[Release-log]
N/A

Change-Id: Ib7a5a4d7f086fe7a6c97061b9db0e00de03408d4
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5395042
2 files changed