NTFS: Really final white space cleanups.

fs/ntfs/ChangeLog

 ToDo:
 	- Find and fix bugs.
+	- Either invalidate quotas or update the quota charges on NTFS 3.x
+	  volumes with quota tracking enabled ($Quota).
+	- Checkpoint or disable the user space journal ($UsnJrnl).
 	- Implement aops->set_page_dirty() in order to take control of buffer
 	  dirtying. Not having it means if page_has_buffers(), all buffers
 	  will be dirtied with the page. And if not they won't be. That is
 	  fine for the moment but will break once we enable metadata updates.
-	- Implement sops->dirty_inode() to implement {a,m,c} time updates and
+	  For now just always using __set_page_dirty_nobuffers() for metadata
+	  pages as nothing can dirty a page other than ourselves. Should this
+	  change, we will really need to roll our own ->set_page_dirty().
+	- Implement sops->dirty_inode() to implement {a,m,c}time updates and
 	  such things.
 	- Implement sops->write_inode().
 	- In between ntfs_prepare/commit_write, need exclusion between