librem5: Enable distro_bootcmd
This enables distro_bootcmd for the imx8m SOM and the Librem5 dev kit. While the distro protocol is not fully adhered to, the boot.scr from flash-kernel 2db0e4a3 can be booted.
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This enables distro_bootcmd for the imx8m SOM and the Librem5 dev kit. While the distro protocol is not fully adhered to, the boot.scr from flash-kernel 2db0e4a3 can be booted.