The 32-bit TCG bug has been fixed a while ago, so we can enable
this test for sparc64 now, too. Unfortunately, OpenBIOS does not
work with the sun4v machine anymore (it needs to catch up with the
improved emulation), so we can only enable this test for the sun4u
machine right now.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>