Librem5 devkit/phone support
This MR updates various components (u-boot, kernel, device package, etc) associated with booting pmos on the librem5 devkit and phone.
It also adds support to postmarketOS for the librem5 phone.
It includes !855 (closed) and depends on https://gitlab.com/postmarketOS/pmbootstrap/merge_requests/1856
Edited by Administrator