xen: include xen/types.h in domain.h

The public header expects a few types to be present.

This works in the code base only because types.h is included by some
other headers which happen to be placed before the inclusion of
domain.h.

Include types.h before xen.h in domain.h to fix it properly.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/include/xen/domain.h

@@ -2,6 +2,8 @@
 #ifndef __XEN_DOMAIN_H__
 #define __XEN_DOMAIN_H__
 
+#include <xen/types.h>
+
 #include <public/xen.h>
 #include <asm/domain.h>
 #include <asm/numa.h>