realtek: rtl838x: enable U-Boot env NVMEM layout in kernel
This is a preparation to convert some more RTL838x devices to NVMEM.
Signed-off-by: Jan Hoffmann <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/22055
Signed-off-by: Hauke Mehrtens <[email protected]>
Jan Hoffmann