cmd_u-boot.img := ./tools/mkimage -f auto -A arm -T firmware -C none -O u-boot -a 0x80800000 -e 0x80800000 -p 0x0 -n "U-Boot 2021.01"" for j721e board" -E -b arch/arm/dts/k3-j721e-common-proc-board.dtb -b arch/arm/dts/k3-j721e-tps65917-proc-board.dtb -b arch/arm/dts/k3-j721e-sk.dtb  -d u-boot-nodtb.bin u-boot.img >/dev/null 
