Various EFI fixes:

  - Fix the layering violation in the use of the EFI runtime services
    availability mask in users of the 'efivars' abstraction

  - Revert build fix for GCC v4.8 which is no longer supported

  - Clean up some x86 EFI stub details, some of which are borderline bugs
    that copy around garbage into padding fields - let's fix these
    out of caution.

  - Fix build issues while working on RISC-V support

  - Avoid --whole-archive when linking the stub on arm64

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Merge tag 'efi-urgent-for-v5.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/urgent

Pull EFI fixes from Ard Biesheuvel:

 - Fix the layering violation in the use of the EFI runtime services
   availability mask in users of the 'efivars' abstraction
 - Revert build fix for GCC v4.8 which is no longer supported
 - Some fixes for build issues found by Atish while working on RISC-V support
 - Avoid --whole-archive when linking the stub on arm64
 - Some x86 EFI stub cleanups from Arvind