various fixes

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11792 6c8e4198-a580-4521-a02f-c9ae86df1db9
generic_cpuid: fixed xsave cpuid leaf when xsave is disabled (need to clear output)

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11793 6c8e4198-a580-4521-a02f-c9ae86df1db9