tegra2: Enable SPI environment on Seaboard

This uses the SPI flash on Seaboard to store an 8KB environment.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/include/configs/tegra2-common.h b/include/configs/tegra2-common.h
index e233b1c..ffea401 100644
--- a/include/configs/tegra2-common.h
+++ b/include/configs/tegra2-common.h
@@ -51,8 +51,7 @@
 #define CONFIG_OF_LIBFDT		/* enable passing of devicetree */
 
 /* Environment */
-#define CONFIG_ENV_IS_NOWHERE
-#define CONFIG_ENV_SIZE			0x20000	/* Total Size Environment */
+#define CONFIG_ENV_SIZE			0x2000	/* Total Size Environment */
 
 /*
  * Size of malloc() pool