[][mtd: mtk-snand: add more nfi status check]

[Description]
Add extra NFI status check after interrupt done for read/write
operations of mtk-snand driver

[Release-log]
N/A

Change-Id: I0f126cfdca3b34db4c0c30239416bcf73e68f2fb
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4553306
1 file changed