rockchip: rk3288-miqi: Change to use FIT

Change to use FIT and FIT_SIGNATURE when loading U-Boot proper in SPL to
allow checksum validation and fallback loading of FIT from a different
mmc device.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
1 file changed