UBI: rename ubi_dbg_dump_mkvol_req

I am going to remove the "UBI debugging" compilation option and make the
debugging stuff to be always compiled it. This patch is a preparation
which renames 'ubi_dbg_dump_mkvol_req()' to 'ubi_dump_mkvol_req()'.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index f406112..633ac82 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -644,7 +644,7 @@
 
 bad:
 	dbg_err("bad volume creation request");
-	ubi_dbg_dump_mkvol_req(req);
+	ubi_dump_mkvol_req(req);
 	return err;
 }