UBIFS: rename dumping functions

This commit re-names all functions which dump something from "dbg_dump_*()" to
"ubifs_dump_*()". This is done for consistency with UBI and because this way it
will be more logical once we remove the debugging sompilation option.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

fs/ubifs/file.c

@@ -97,7 +97,7 @@ static int read_block(struct inode *inode, void *addr, unsigned int block,
 dump:
 	ubifs_err("bad data node (block %u, inode %lu)",
 		  block, inode->i_ino);
-	dbg_dump_node(c, dn);
+	ubifs_dump_node(c, dn);
 	return -EINVAL;
 }