xs.h is LGPL.  xenctrl.h is GPL.  If xs.h includes xenctrl.h it 
implicitly makes xs.h GPL'd.  The following patches remove the xenctrl.h 
dependency in xs.h.

There's a hack to work around the problem of Xen's {u,s}{8,16,32,64} 
type usage.  It would be nicer to have a common types header file in 
xen/include/public.  Is there a right way to do this?

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Regards,

Anthony Liguori