mm: add a macros to determing private vma-s (v2)

Now this macros returns true only for anon | priv vmas.
It will be expanded to file | priv in a follow patch.

v2: check flags together.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/restorer.h

@@ -273,4 +273,6 @@ find_shmem(struct shmems *shmems, unsigned long shmid)
 /* the restorer_blob_offset__ prefix is added by gen_offsets.sh */
 #define restorer_sym(rblob, name)	((void *)(rblob) + restorer_blob_offset__##name)
 
+#define vma_priv(vma) (vma_entry_is(vma, VMA_AREA_REGULAR | VMA_ANON_PRIVATE))
+
 #endif /* CR_RESTORER_H__ */