include/configs: remove references to SMNAND_ENV_OFFSET

In mancy cases both CONFIG_ENV_OFFSET and CONFIG_ENV_ADDR point
to an otherwise-unused SMNAND_ENV_OFFSET.
This patch will set both CONFIG_ENV_OFFSET and CONFIG_ENV_ADDR to
whatever value was defined by SMNAND_ENV_OFFSET.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/include/configs/devkit8000.h b/include/configs/devkit8000.h
index 2bf0983..bd325e1 100644
--- a/include/configs/devkit8000.h
+++ b/include/configs/devkit8000.h
@@ -174,9 +174,8 @@
 					0x01000000) /* 16MB */
 
 /* NAND and environment organization  */
-#define SMNAND_ENV_OFFSET		0x260000 /* environment starts here */
 
-#define CONFIG_ENV_OFFSET		SMNAND_ENV_OFFSET
+#define CONFIG_ENV_OFFSET		0x260000
 
 /* SRAM config */
 #define CONFIG_SYS_SRAM_START              0x40200000