Merge branch '2022-04-22-assorted-updates'

- Add "-q" to fdt addr and use it in distro_bootcmd to make the user
  experience less scary reading in normal try/fail cases.
- Let the adc update an environment variable like many other commands do
- Fix TPL SEPARATE_BSS check when locating DTB
- Allow ":" in PXE file names again
- Two Apple M1 fixes