rockchip: rk3188: Add Radxa Rock board

The Rock is a RK3188 based single board computer by Radxa.
Currently it still relies on the proprietary DDR init and
cannot use the generic SPL, but at least is able to boot
a linux kernel and system up to a regular login prompt.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Fix sort order in defconfig, enable CONFIG_SPL_TINY_MEMSET:
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/rock.h b/include/configs/rock.h
new file mode 100644
index 0000000..de5291c
--- /dev/null
+++ b/include/configs/rock.h
@@ -0,0 +1,30 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#define ROCKCHIP_DEVICE_SETTINGS
+#include <configs/rk3188_common.h>
+
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_SYS_MMC_ENV_DEV 0
+
+#ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
+/* SPL @ 32k for 34k
+ * u-boot directly after @ 68k for 400k or so
+ * ENV @ 992k
+ */
+#define CONFIG_ENV_OFFSET ((1024-32) * 1024)
+#else
+/* SPL @ 32k for ~36k
+ * ENV @ 96k
+ * u-boot @ 128K
+ */
+#define CONFIG_ENV_OFFSET (96 * 1024)
+#endif
+
+#endif