rockchip: Add basic support for evb-rv1108 board

Add basic support for rv1108 evb, whith this patch we
can boot into u-boot console.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/configs/evb_rv1108.h

@@ -0,0 +1,26 @@
+/*
+ * (C) Copyright 2016 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#include <configs/rv1108_common.h>
+
+/*
+ * Default environment settings
+ */
+#define CONFIG_EXTRA_ENV_SETTINGS                                       \
+	"netdev=eth0\0"                                                 \
+	"ipaddr=172.16.12.50\0"                                         \
+	"serverip=172.16.12.69\0"					\
+	""
+#define CONFIG_BOOTCOMMAND						\
+	"sf probe;"							\
+	"sf read 0x62000000 0x140800 0x500000;"				\
+	"dcache off;"							\
+	"go 0x62000000"
+
+#endif