[][Remove mt7981 PCIe clock default on]

[Description]
Remove mt7981 PCIe clock default on, and add clocks control in PCIe node.

[Release-log]
N/A

Change-Id: I0eda423fb0a1d8a2d24d108a49a987c7e0e710b7
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5368869
2 files changed