[][OpenWrt Dev][Fix ecc status reporting of mtk-snand driver]

[Description]
Fix the ecc status reporting of mtk-snand driver to make sure the status
can be passed to upper layer, which is required by mtd framework and NMBM

[Release-log]
N/A

Change-Id: Id130372658d167ad6ead0802717bc7c7ea7afd74
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4529287
1 file changed