Always return latest pmsts instead of the old one (Xiantao Zhang)

It may lead to the issue when booting windows guests with acpi=1
if return the old pmsts.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6375 c046a42c-6fe2-441c-8c8c-71466251a162