x86: qemu: Create separate i440fx and q35 device trees

Although the two qemu-x86 targets (i440fx and q35) share a lot in
common, they still have something that cannot easily handled in one
single device tree). Split to create two dedicated device tree files
and make the i440fx be the default build target.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/x86/dts/Makefile

@@ -3,7 +3,8 @@ dtb-y += chromebook_link.dtb \
 	crownbay.dtb \
 	galileo.dtb \
 	minnowmax.dtb \
-	qemu-x86.dtb
+	qemu-x86_i440fx.dtb \
+	qemu-x86_q35.dtb
 
 targets += $(dtb-y)
 

arch/x86/dts/qemu-x86_i440fx.dts

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+/include/ "serial.dtsi"
+
+/ {
+	model = "QEMU x86 (I440FX)";
+	compatible = "qemu,x86";
+
+	config {
+		silent_console = <0>;
+	};
+
+	chosen {
+		stdout-path = "/serial";
+	};
+
+	pci {
+		compatible = "pci-x86";
+		#address-cells = <3>;
+		#size-cells = <2>;
+		u-boot,dm-pre-reloc;
+		ranges = <0x02000000 0x0 0xc0000000 0xc0000000 0 0x10000000
+			0x42000000 0x0 0xd0000000 0xd0000000 0 0x10000000
+			0x01000000 0x0 0x2000 0x2000 0 0xe000>;
+	};
+
+};

arch/x86/dts/qemu-x86_q35.dts

@@ -10,7 +10,7 @@
 /include/ "serial.dtsi"
 
 / {
-	model = "QEMU x86";
+	model = "QEMU x86 (Q35)";
 	compatible = "qemu,x86";
 
 	config {