uniphier: replace DIV_ROUND_UP() with div_round_up() from utils_def.h

Use the helper in utils_def.h instead of the own macro.

Change-Id: I527f9e75914d60f66354e365006b960ba5e8cbae
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

plat/socionext/uniphier/uniphier_nand.c

 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -16,8 +16,6 @@
 
 #include "uniphier.h"
 
-#define DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
-
 #define NAND_CMD_READ0		0
 #define NAND_CMD_READSTART	0x30
 
@@ -166,7 +164,7 @@ static size_t __uniphier_nand_read(struct uniphier_nand *nand, int lba,
 	int pages_per_block = nand->pages_per_block;
 	int page_size = nand->page_size;
 	int blocks_to_skip = lba / pages_per_block;
-	int pages_to_read = DIV_ROUND_UP(size, page_size);
+	int pages_to_read = div_round_up(size, page_size);
 	int page = lba % pages_per_block;
 	int block = 0;
 	uintptr_t p = buf;