[][MT7981][SPIM NAND][Add fudanmicro spi nand support]

[Description]
Add fudanmicro spi nand support

[Release-log]
N/A

Change-Id: If9c3c456996d936588e2b0cb7dd042c251186fbd
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8569855
1 file changed