qemu: Destroy whole memory tree

When removing path where huge pages are call virFileDeleteTree
instead of plain rmdir(). The reason is that in the near future
there's going to be more in the path than just files - some
subdirs. Therefore plain rmdir() is not going to be enough.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>

src/qemu/qemu_process.c

@@ -3348,10 +3348,8 @@ qemuProcessBuildDestroyMemoryPathsImpl(virQEMUDriverPtr driver,
             return -1;
         }
     } else {
-        if (rmdir(path) < 0 &&
-            errno != ENOENT)
-            VIR_WARN("Unable to remove hugepage path: %s (errno=%d)",
-                     path, errno);
+        if (virFileDeleteTree(path) < 0)
+            return -1;
     }
 
     return 0;