NAND: remove NAND_MAX_CHIPS definitions

This change follows the change by Wolfgang Grandegger (commit 6c869637fef),
which allows to remove useless NAND_MAX_CHIPS definitions in board config
files.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Scott Wood <scottwood@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/include/configs/P1_P2_RDB.h b/include/configs/P1_P2_RDB.h
index 00fa74d..cee788a 100644
--- a/include/configs/P1_P2_RDB.h
+++ b/include/configs/P1_P2_RDB.h
@@ -273,11 +273,10 @@
 #endif
 #endif
 
+#define CONFIG_CMD_NAND
 #define CONFIG_SYS_NAND_BASE_LIST	{CONFIG_SYS_NAND_BASE}
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
-#define NAND_MAX_CHIPS			1
 #define CONFIG_MTD_NAND_VERIFY_WRITE
-#define CONFIG_CMD_NAND			1
 #define CONFIG_NAND_FSL_ELBC		1
 #define CONFIG_SYS_NAND_BLOCK_SIZE	(16 * 1024)