Blackfin: bf548-ezkit/bf561-ezkit: update env location

Relocate the env to one of the small end sectors to avoid issues with
embedding it, such as support being broken (by recent commit ea882baf9c1),
and for taking a while to save updates.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/configs/bf548-ezkit.h b/include/configs/bf548-ezkit.h
index 4d7d877..3550fd3 100644
--- a/include/configs/bf548-ezkit.h
+++ b/include/configs/bf548-ezkit.h
@@ -113,12 +113,12 @@
 #define CONFIG_ENV_OFFSET	0x60000
 #define CONFIG_ENV_SIZE		0x20000
 #else
+/* The BF548-EZKIT uses a top boot flash */
 #define CONFIG_ENV_IS_IN_FLASH	1
-#define CONFIG_ENV_ADDR		0x20002000
-#define CONFIG_ENV_OFFSET	0x2000
-#define CONFIG_ENV_SIZE		0x2000
-#define CONFIG_ENV_SECT_SIZE	(128 * 1024)
-#define CONFIG_ENV_IS_EMBEDDED_IN_LDR
+#define CONFIG_ENV_ADDR		(CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
+#define CONFIG_ENV_OFFSET	(0x1000000 - CONFIG_ENV_SECT_SIZE)
+#define CONFIG_ENV_SIZE		CONFIG_ENV_SECT_SIZE
+#define CONFIG_ENV_SECT_SIZE	0x8000
 #endif