[GFS2] Shrink gfs2_inode (3) - di_mode

This removes the duplicate di_mode field in favour of using the
inode->i_mode field. This saves 4 bytes.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/ops_dentry.c b/fs/gfs2/ops_dentry.c
index c36f9e3..d355899 100644
--- a/fs/gfs2/ops_dentry.c
+++ b/fs/gfs2/ops_dentry.c
@@ -76,7 +76,7 @@
 	if (!gfs2_inum_equal(&ip->i_num, &inum))
 		goto invalid_gunlock;
 
-	if (IF2DT(ip->i_di.di_mode) != type) {
+	if (IF2DT(ip->i_inode.i_mode) != type) {
 		gfs2_consist_inode(dip);
 		goto fail_gunlock;
 	}