rockchip: add support for rk3288 PopMetal board

PopMetal is a rockchip rk3288 based board made by ChipSpark, which has
many interface such as HDMI, VGA, USB, micro-SD card, WiFi, Audio and
Gigabit Ethernet.

Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>

board/chipspark/popmetal_rk3288/Kconfig

@@ -0,0 +1,15 @@
+if TARGET_POPMETAL_RK3288
+
+config SYS_BOARD
+	default "popmetal_rk3288"
+
+config SYS_VENDOR
+	default "chipspark"
+
+config SYS_CONFIG_NAME
+	default "popmetal_rk3288"
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+
+endif

board/chipspark/popmetal_rk3288/MAINTAINERS

@@ -0,0 +1,6 @@
+POPMETAL-RK3288
+M:	Lin Huang <hl@rock-chips.com>
+S:	Maintained
+F:	board/chipspark/popmetal_rk3288
+F:	include/configs/popmetal_rk3288.h
+F:	configs/popmetal-rk3288_defconfig

board/chipspark/popmetal_rk3288/Makefile

@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2016 Rockchip Electronics Co., Ltd
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+obj-y	+= popmetal-rk3288.o

board/chipspark/popmetal_rk3288/popmetal-rk3288.c

@@ -0,0 +1,15 @@
+/*
+ * (C) Copyright 2016 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <spl.h>
+
+void board_boot_order(u32 *spl_boot_list)
+{
+	/* eMMC prior to sdcard */
+	spl_boot_list[0] = BOOT_DEVICE_MMC2;
+	spl_boot_list[1] = BOOT_DEVICE_MMC1;
+}