x86: Add theadorable-x86-dfi-bt700 board support

This patch adds support for the BayTrail based theadorable-x86-dfi-bt700
board which uses the DFI BT700 BayTrail Qseven SoM on a custom baseboard.
The main difference to the DFI baseboard is, that it isn't equipped
with a Super IO chip and uses the internal HS SIO UART (memory mapped
PCI based) as the console UART.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/dts/Makefile b/arch/x86/dts/Makefile
index ca086bd..3f534ad 100644
--- a/arch/x86/dts/Makefile
+++ b/arch/x86/dts/Makefile
@@ -15,6 +15,7 @@
 	minnowmax.dtb \
 	qemu-x86_i440fx.dtb \
 	qemu-x86_q35.dtb \
+	theadorable-x86-dfi-bt700.dtb \
 	broadwell_som-6896.dtb \
 	baytrail_som-db5800-som-6867.dtb
 
diff --git a/arch/x86/dts/theadorable-x86-dfi-bt700.dts b/arch/x86/dts/theadorable-x86-dfi-bt700.dts
new file mode 100644
index 0000000..75f9ffa
--- /dev/null
+++ b/arch/x86/dts/theadorable-x86-dfi-bt700.dts
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/dts-v1/;
+
+#include "dfi-bt700.dtsi"
+
+/ {
+	model = "theadorable-x86-DFI-BT700";
+	compatible = "anonymous,theadorable-x86-dfi-bt700", "dfi,bt700",
+			"intel,baytrail";
+
+	aliases {
+		serial0 = &pciuart0;
+		spi0 = &spi;
+	};
+};