add "flasher flash_dtbo" command
Adds a command that flashes the dtbo (Device Tree Blob Overlay) partition with an image stored at chroot_rootfs_[device]/boot/dtbo.img
.
That image has to be generated by the linux package (see oneplus-kebab). Without the dtbo image populated some devices won't boot when compiling the kernel with CONFIG_BUILD_ARM64_DT_OVERLAY
.
The dtbo partition has to be specified with a new deviceinfo option: deviceinfo_flash_fastboot_partition_dtbo
.