m53menlo: Switch to deriving CONFIG_SYS_NAND_PAGE_COUNT

Typically platforms will define CONFIG_SYS_NAND_PAGE_COUNT based on
CONFIG_SYS_NAND_BLOCK_SIZE / CONFIG_SYS_NAND_PAGE_SIZE.  Switch to this
in preparation for migrating CONFIG_SYS_NAND namespace to Kconfig.

Cc: Marek Vasut <marex@denx.de>
Cc: Olaf Mandel <o.mandel@menlosystems.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/m53menlo.h b/include/configs/m53menlo.h
index 813d326..11c8a87 100644
--- a/include/configs/m53menlo.h
+++ b/include/configs/m53menlo.h
@@ -140,9 +140,11 @@
 #define CONFIG_SPL_STACK		0x70004000
 
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	CONFIG_SPL_PAD_TO
+#define CONFIG_SYS_NAND_BLOCK_SIZE	(128 * 1024)
 #define CONFIG_SYS_NAND_PAGE_SIZE	2048
 #define CONFIG_SYS_NAND_OOBSIZE		64
-#define CONFIG_SYS_NAND_PAGE_COUNT	64
+#define CONFIG_SYS_NAND_PAGE_COUNT	(CONFIG_SYS_NAND_BLOCK_SIZE / \
+					 CONFIG_SYS_NAND_PAGE_SIZE)
 #define CONFIG_SYS_NAND_SIZE		(256 * 1024 * 1024)
 #define CONFIG_SYS_NAND_BAD_BLOCK_POS	0