ARM: at91: sama5: move the nandflash env config to at91-sama5_common.h

As all sama5 nandflash env configurations are same, so move them to
at91-sama5_common.h.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
diff --git a/include/configs/sama5d4ek.h b/include/configs/sama5d4ek.h
index ee31e9d..be2c2ce 100644
--- a/include/configs/sama5d4ek.h
+++ b/include/configs/sama5d4ek.h
@@ -127,14 +127,7 @@
 				"sf read 0x22000000 0x100000 0x300000; " \
 				"bootz 0x22000000 - 0x21000000"
 #elif CONFIG_SYS_USE_NANDFLASH
-/* bootstrap + u-boot + env in nandflash */
-#define CONFIG_ENV_IS_IN_NAND
-#define CONFIG_ENV_OFFSET		0xc0000
-#define CONFIG_ENV_OFFSET_REDUND	0x100000
-#define CONFIG_ENV_SIZE			0x20000
-#define CONFIG_BOOTCOMMAND	"nand read 0x21000000 0x180000 0x80000;" \
-				"nand read 0x22000000 0x200000 0x600000;" \
-				"bootz 0x22000000 - 0x21000000"
+/* override the bootcmd, bootargs and other configuration for nandflash env*/
 #elif CONFIG_SYS_USE_MMC
 /* override the bootcmd, bootargs and other configuration for sd/mmc env */
 #endif