efi-core-2020-12-14

 - Don't move BSS section around pointlessly in the x86 decompressor
 - Refactor helper for discovering the EFI secure boot mode
 - Wire up EFI secure boot to IMA for arm64
 - Some fixes for the capsule loader
 - Expose the RT_PROP table via the EFI test module
 - Relax DT and kernel placement restrictions on ARM