x86, efi: Remove virtual-mode SetVirtualAddressMap call

The spec says that SetVirtualAddressMap doesn't work once you're in
virtual mode, so there's no point in having infrastructure for calling
it from there.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Link: http://lkml.kernel.org/r/1304623186-18261-1-git-send-email-mjg@redhat.com


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>