rk3308: Remove unused NAND defines

These platforms do not currently enable NAND, remove these references.

Cc: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/rk3308_common.h b/include/configs/rk3308_common.h
index edaf78a..496f462 100644
--- a/include/configs/rk3308_common.h
+++ b/include/configs/rk3308_common.h
@@ -9,11 +9,6 @@
 #include "rockchip-common.h"
 
 #define CONFIG_SYS_CBSIZE		1024
-#define CONFIG_SYS_MAX_NAND_DEVICE	1
-#define CONFIG_SYS_NAND_ONFI_DETECTION
-#define CONFIG_SYS_NAND_PAGE_SIZE	2048
-#define CONFIG_SYS_NAND_PAGE_COUNT	64
-#define CONFIG_SYS_NAND_SIZE		(256 * 1024 * 1024)
 #define CONFIG_SPL_MAX_SIZE		0x20000
 #define CONFIG_SPL_BSS_START_ADDR	0x00400000
 #define CONFIG_SPL_BSS_MAX_SIZE		0x2000