build from:
186b00109f rockchip: rk3568: place U-Boot at 10MB offset
build command:
./make.sh rk3568
update feature:
Support get U-Boot entry address by fit header info
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: I6ee4143dd9469ba100ba328c0e34cbbcb0032d73