access: disable phys-bits=36 for now

Support for guest-MAXPHYADDR < host-MAXPHYADDR is not upstream yet,
it should not be enabled.  Otherwise, all the pde.36 and pte.36
fail and the test takes so long that it times out.

Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/x86/unittests.cfg b/x86/unittests.cfg
index bf0d02e..504e04e 100644
--- a/x86/unittests.cfg
+++ b/x86/unittests.cfg
@@ -116,7 +116,7 @@
 [access]
 file = access.flat
 arch = x86_64
-extra_params = -cpu host,phys-bits=36
+extra_params = -cpu host,host-phys-bits
 
 [smap]
 file = smap.flat