Revert "test_firmware: Test platform fw loading on non-EFI systems"

This reverts commit 2d38dbf8 as it broke
the build in linux-next

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 2d38dbf8 ("test_firmware: Test platform fw loading on non-EFI systems")
Cc: stable@vger.kernel.org
Cc: Scott Branden <scott.branden@broadcom.com>
Cc: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200727165539.0e8797ab@canb.auug.org.au


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>