Cosmetic name change of ClearFog sysupgrade script and its functions to
more generic sdcard. This way it won't be confusing for other future
device additions.
Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
Add and enable sysupgrade support for clearfog boards, based on how the
brcm2708 target does it.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Felix Fietkau <nbd@nbd.name>