ARM: dockstar: move start of environment area

The default dockstar configuration for U-Boot currently causes it to
overrun the environment area, so that a "saveenv" command bricks the
device.  This patch moves the environment to a higher address to avoid
that.
Signed-off-by: NEric Cooper <ecc@cmu.edu>

include/configs/dockstar.h

@@ -57,8 +57,8 @@
  * it has to be rounded to sector size
  */
 #define CONFIG_ENV_SIZE			0x20000	/* 128k */
-#define CONFIG_ENV_ADDR			0x60000
-#define CONFIG_ENV_OFFSET		0x60000	/* env starts here */
+#define CONFIG_ENV_ADDR			0x80000
+#define CONFIG_ENV_OFFSET		0x80000	/* env starts here */
 
 /*
  * Default environment variables