x86: minnowmax: Convert to text environment

Use the common include along with some additions.

Drop everything from the config.h file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> # Intel Edison
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

board/intel/minnowmax/minnowmax.env

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2015 Google, Inc
+ */
+
+#include <env/x86.env>
+
+/* don't use i8042-kbd */
+stdin=usbkbd,serial
+
+usb_pgood_delay=40

include/configs/minnowmax.h

@@ -2,19 +2,3 @@
 /*
  * Copyright (C) 2015 Google, Inc
  */
-
-/*
- * board/config.h - configuration options, board specific
- */
-
-#ifndef __CONFIG_H
-#define __CONFIG_H
-
-#include <configs/x86-common.h>
-
-#define CFG_STD_DEVICES_SETTINGS	"stdin=usbkbd,serial\0" \
-					"stdout=vidconsole,serial\0" \
-					"stderr=vidconsole,serial\0" \
-					"usb_pgood_delay=40\0"
-
-#endif	/* __CONFIG_H */