UBI: use byte hexdump

More handy since word hexdump prints in host endian.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index 7851374..56956ec 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -42,8 +42,8 @@
 	dbg_msg("data_offset    %d",    be32_to_cpu(ec_hdr->data_offset));
 	dbg_msg("hdr_crc        %#08x", be32_to_cpu(ec_hdr->hdr_crc));
 	dbg_msg("erase counter header hexdump:");
-	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 4,
-		       (void *)ec_hdr, UBI_EC_HDR_SIZE, 1);
+	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+		       ec_hdr, UBI_EC_HDR_SIZE, 1);
 }
 
 /**