u-boot: Fix booting issues for 64bit boards
u-boot: Fix booting issues for 64bit boards

In kirkstone we use u-boot 2022.01 which added as mandatory usage of scp.
As it's used for power relates stuff and we don't need it atm set to to empty.

Without this fix generated u-boot cannot boot.

Signed-off-by: Marek Belisko <2e0084147176644ce91c5df4ae01a4a541d3616d@open-nandra.com>

linux-sunxi/meta-sunxi,linux-sunxi/meta-sunxi,linux-sunxi/meta-sunxi