[][kernel][common][spinor][Add EN25QX256A]

[Description]
Add new flash EN25QX256A for mt7988 and QVL pass.

[Release-log]
N/A

Change-Id: I41324d027a847ef8a081fc37d5da785234e8344c
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7772782
1 file changed