scripts/mkimage: ucode support
This is related to #11478 adding to commits to:
- 9da6b19a extends the mkimage scripts to support early initrd ucode updates
- 27a5694e adds a ucode profile based on extended
This MR should be used as a base for further discussions. It currently only works for Intel CPU ucode updates since there is no package providing an early initrd for AMD CPU ucode, yet.
Edited by Thomas Liske