configs: aspeed: Make EXTRA_ENV_SETTINGS board specific

Move CONFIG_EXTRA_ENV_SETTINGS to board-specific
configuration headers.

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
diff --git a/include/configs/evb_ast2500.h b/include/configs/evb_ast2500.h
index dc032c1..558d6f9 100644
--- a/include/configs/evb_ast2500.h
+++ b/include/configs/evb_ast2500.h
@@ -13,4 +13,11 @@
 
 #define CONFIG_SYS_UBOOT_BASE		CONFIG_SYS_TEXT_BASE
 
+/* Memory Info */
+#define CONFIG_SYS_LOAD_ADDR		0x83000000
+
+/* Misc */
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	""
+
 #endif	/* __CONFIG_H */