rm flash/zImage-dtb
rm ./flash/boot.img

cat linux/arch/arm/boot/zImage linux/arch/arm/boot/dts/rk3066a-mk808.dtb > flash/zImage-dtb

mkbootimg --kernel flash/zImage-dtb --ramdisk /dev/null --base 60800000 -o flash/boot.img

mv flash/boot.img flash/boot.img-old

rkcrc flash/boot.img-old flash/boot.img

rkflashtool w boot < ./flash/boot.img

rkflashtool b