Uses patchset from hrdl rather than m-weigand. It was rebased against
v6.15 by myself, from v6.15_rc3. hrdl rebased m-weigand's patchset from
v6.12 and improved upon it.
Much like linux-rpi, source code is generated by first using upstream
linux source code, patched with minor release patchset. The PineNote
downstream patches are then applied.
Part-of: https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/6667
