aspeed: Support for ast2500 Eval Board

ast2500 Eval Board device tree and board specific configuration.
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/aspeed/evb_ast2500/Kconfig b/board/aspeed/evb_ast2500/Kconfig
new file mode 100644
index 0000000..73a8ae8
--- /dev/null
+++ b/board/aspeed/evb_ast2500/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_EVB_AST2500
+
+config SYS_BOARD
+	default "evb_ast2500"
+
+config SYS_VENDOR
+	default "aspeed"
+
+config SYS_CONFIG_NAME
+	default "evb_ast2500"
+
+endif