This patch replaces the custom autoload quirk of the
RT-AC58U with a bootargs-append overwrite.
The vendor's u-boot doesn't leave the bootargs / cmdline alone,
so the it can't be overwritten in any other way right now...
And of course, this will be a lot of fun to deal with once
the device switches to the new spi-nand subsystem.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
6840f15a16