[][kernel][mt7986][spim][dts: Fix SPIM-NAND/NOR max frequency]

[Description]
Fix SPIM-NAND/NOR max frequency

[Release-log]
N/A

Change-Id: I7fb1615909e21407ab0dab55aaf8c6f7e8ce6b48
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7357663
4 files changed