Dynamically detect block device in the boot command, this allows to
support both MMC and virtio block devices.
Signed-off-by: Leo Yan <leo.yan@arm.com>
The boot command for Total Compute has many aspects and changes from time
to time. So move it to an .env file where it can be a proper script.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
