[][Change clk by its own dts node instead of global clk]

[Description]
Change mtk nand to enable clk by its own dts node instead of global clk

[Release-log]
N/A

Change-Id: Ib332e4f538b25adb74d187f74e77452411a453ac
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4752604
3 files changed