-DEVICE_TYPE=r8a7796-m3ulcb
-DEVICE_NAME=m3ulcb
-DEVICE_DTB=Image-r8a7796-m3ulcb.dtb
-DEVICE_KERNEL=Image
-DEVICE_INITRAMFS=initramfs-netboot-image-m3ulcb.ext4.gz
-DEVICE_NBDROOT=core-image-minimal-m3ulcb.ext4.xz
-DEVICE_NBDROOT_COMPRESSION=xz
-DEVICE_BOOT_METHOD=u-boot
-DEVICE_BOOT_TYPE=booti