Allow usage of UUID in bootloader parameters
Currently working with osk-sdl with u-boot on Mobian. For the kernel parameters command line It appears osk-sdl-root can only be passed a block device, not a UUID. Using a UUID would allow an image built that could be flashed to both the emmc and microsd card of the pinephone, for example - the block devices are different for the emmc and microsd card so an image created for one wouldn't necessarily work for others.