configure: enable kvm on x32 Here's a trivial change to enable kvm on x32 architecture. I'm not 100% sure the result works correctly in all cases, but this is a good start and in theory everything should work. Signed-off-by: Adam Borowski <kilobyte@angband.pl> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Acked-by: Paolo Bonzini <pbonzini@redhat.com>