[] [Add spi runtime PM support]

[Description]
Add ahb clk and enable runtime pm

[Release-log]
N/A

Change-Id: Ie0043075306e33646e3c8182bf00d794eda03cd3
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5491923
1 file changed