dm: Remove header vmm.h

vmm.h has some unused definitions.

Keep the useful definitions and delete vmm.h

Tracked-On: #6282
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>

devicemodel/include/mem.h

@@ -28,6 +28,8 @@
 
 #ifndef _MEM_H_
 #define	_MEM_H_
+#include "types.h"
+#include "vhm_ioctl_defs.h"
 
 struct vmctx;