UBI: comply with coding style

Join all the split printk lines in order to stop checkpatch complaining.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c
index d089df0..f913d70 100644
--- a/drivers/mtd/ubi/misc.c
+++ b/drivers/mtd/ubi/misc.c
@@ -128,9 +128,7 @@
 	ubi->beb_rsvd_level = ubi->bad_peb_limit - ubi->bad_peb_count;
 	if (ubi->beb_rsvd_level < 0) {
 		ubi->beb_rsvd_level = 0;
-		ubi_warn("number of bad PEBs (%d) is above the expected limit "
-			 "(%d), not reserving any PEBs for bad PEB handling, "
-			 "will use available PEBs (if any)",
+		ubi_warn("number of bad PEBs (%d) is above the expected limit (%d), not reserving any PEBs for bad PEB handling, will use available PEBs (if any)",
 			 ubi->bad_peb_count, ubi->bad_peb_limit);
 	}
 }