ext4: move /proc setup and teardown out of mballoc.c

...and into the core setup/teardown code in fs/ext4/super.c so that
other parts of ext4 can define tuning parameters.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 50a4846..b9c9371 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -955,6 +955,8 @@
 void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
 			unsigned long *blockgrpp, ext4_grpblk_t *offsetp);
 
+extern struct proc_dir_entry *ext4_proc_root;
+
 /*
  * Function prototypes
  */