x86/efi: Add better error logging to EFI boot stub

Hopefully this will enable us to better debug:
https://bugzilla.kernel.org/show_bug.cgi?id=68761

Signed-off-by: Ulf Winkelvos <ulf@winkelvos.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
1 file changed