hvmloader: fix build with certain iasl versions

hvmloader: fix build with certain iasl versions

While most of them support what we have now, Wheezy's dislikes the
empty range. Put a fake one in place - it's getting overwritten upon
evaluation of _CRS anyway.

The range could be grown (downwards) if necessary; the way it is now
it is
- the highest possible one below the 36-bit boundary (with 36 bits
  being the lowest common denominator for all supported systems),
- the smallest possible one that said iasl accepts.

Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>