ocfs2: Remove struct ocfs2_journal_handle in favor of handle_t

This is mostly a search and replace as ocfs2_journal_handle is now no more
than a container for a handle_t pointer.

ocfs2_commit_trans() becomes very straight forward, and we remove some out
of date comments / code.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index ac78877..ad4d4a1 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -512,7 +512,7 @@
 				     struct buffer_head *fe_bh)
 {
 	int status = 0;
-	struct ocfs2_journal_handle *handle = NULL;
+	handle_t *handle = NULL;
 	struct ocfs2_truncate_context *tc = NULL;
 	struct ocfs2_dinode *fe;
 
@@ -568,7 +568,7 @@
 	int status;
 	struct inode *inode_alloc_inode = NULL;
 	struct buffer_head *inode_alloc_bh = NULL;
-	struct ocfs2_journal_handle *handle;
+	handle_t *handle;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 	struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
 
@@ -1198,7 +1198,7 @@
  * struct inode.
  * Only takes ip_lock.
  */
-int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle,
+int ocfs2_mark_inode_dirty(handle_t *handle,
 			   struct inode *inode,
 			   struct buffer_head *bh)
 {