ext4: Make printk's consistently prefixed with "EXT4-fs: "

Previously, some were "ext4: ", and some were "EXT4: "; change them to
be consistent with most ext4 printk's, which is to use "EXT4-fs: ".

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index cf3ccf4..2df2e40 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -405,7 +405,7 @@
 	sb = inode->i_sb;
 
 	if (!fname) {
-		printk(KERN_ERR "ext4: call_filldir: called with "
+		printk(KERN_ERR "EXT4-fs: call_filldir: called with "
 		       "null fname?!?\n");
 		return 0;
 	}