[][Fix Gigadevice spi nand dummy bytes and ID data]

[Description]
Fix Gigadevice spi nand dummy bytes and ID data

[Release-Log]
N/A

Change-Id: Ic3f172243343b18b7dd5768f943298bfa323681d
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6001167
1 file changed