qemu_cpu.cfg: Remove PCLMULQDQ bug from whitelist

The pclmulqdq bug is fixed on qemu.git on commit
56383703c060777fd01aaf8d63d5f46d660e9fb9, so we can stop ignoring the
bug and report as an actual failure.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
qemu_cpu.cfg: Whitelist known (but harmless) RHEL6 SVM CPUID bug

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>