[][mtd: spinand: winbond: add support for W25NxxKV series]

[Description]
Change part of commit 3d587bd9054bd2f3ce3dc4e5e46e7a190f3851eb.
Move nmbm related change directly to generic/files-5.4

[Release-log]
N/A

Change-Id: Ia2bbdac17891bff9cf7fa8b8036436249711f81d
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5944439
2 files changed