Currently it's not possible to tftpboot initramfs image on archer-c7-v5
as the image contains tplink-v1-header which leads to:
ath> bootm
## Booting image at 81000000 ...
Bad Magic Number
as U-Boot expects uImage wrapped image.
where tplink-v1 defines KERNEL_INITRAMFS with tplink-v1-header and it's
then used by all devices inheriting from tplink-safeloader. Fix this by
overriding KERNEL_INITRAMFS to KERNEL variable again.
Signed-off-by: Petr Štetiar <ynezz@true.cz>
664266bd89