arm64: dts: move from ARCH_VULCAN to ARCH_THUNDER2

Move and update device tree files as part of transition from Broadcom
Vulcan to Cavium ThunderX2.

The changes are to:
 * rename dts/broadcom/vulcan.dtsi to cavium/thunder2-99xx.dtsi,
   update cpu cores to be "cavium,thunder2", and update SoC to be
   "cavium,thunderx2-cn9900"
 * move SoC dts/broadcom/vulcan-eval.dtsi to cavium/thunder2-99xx.dtsi
   and update board name string
 * Update dts/broadcom/Makefile not to build vulcan dtbs
 * Update dts/cavium/Makefile to build thunder2 dtbs

No changes to the dts contents except the updated "compatible" and
"model" properties.
Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/boot/dts/broadcom/Makefile

 dtb-$(CONFIG_ARCH_BCM2835) += bcm2837-rpi-3-b.dtb
 dtb-$(CONFIG_ARCH_BCM_IPROC) += ns2-svk.dtb ns2-xmc.dtb
-dtb-$(CONFIG_ARCH_VULCAN) += vulcan-eval.dtb
 
 always		:= $(dtb-y)
 subdir-y	:= $(dts-dirs)

arch/arm64/boot/dts/cavium/Makefile

 dtb-$(CONFIG_ARCH_THUNDER) += thunder-88xx.dtb
+dtb-$(CONFIG_ARCH_THUNDER2) += thunder2-99xx.dtb
 
 always		:= $(dtb-y)
 subdir-y	:= $(dts-dirs)

arch/arm64/boot/dts/broadcom/vulcan-eval.dts → arch/arm64/boot/dts/cavium/thunder2-99xx.dts

 /*
- * dts file for Broadcom (BRCM) Vulcan Evaluation Platform
+ * dts file for Cavium ThunderX2 CN99XX Evaluation Platform
  *
+ * Copyright (c) 2017 Cavium Inc.
  * Copyright (c) 2013-2016 Broadcom
  *
  * This program is free software; you can redistribute it and/or
@@ -11,11 +12,11 @@
 
 /dts-v1/;
 
-#include "vulcan.dtsi"
+#include "thunder2-99xx.dtsi"
 
 / {
-	model = "Broadcom Vulcan Eval Platform";
-	compatible = "brcm,vulcan-eval", "brcm,vulcan-soc";
+	model = "Cavium ThunderX2 CN99XX";
+	compatible = "cavium,thunderx2-cn9900", "brcm,vulcan-soc";
 
 	memory {
 		device_type = "memory";

arch/arm64/boot/dts/broadcom/vulcan.dtsi → arch/arm64/boot/dts/cavium/thunder2-99xx.dtsi

 /*
- * dtsi file for Broadcom (BRCM) Vulcan processor
+ * dtsi file for Cavium ThunderX2 CN99XX processor
  *
+ * Copyright (c) 2017 Cavium Inc.
  * Copyright (c) 2013-2016 Broadcom
  * Author: Zi Shen Lim <zlim@broadcom.com>
  *
@@ -13,8 +14,8 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 
 / {
-	model = "Broadcom Vulcan";
-	compatible = "brcm,vulcan-soc";
+	model = "Cavium ThunderX2 CN99XX";
+	compatible = "cavium,thunderx2-cn9900", "brcm,vulcan-soc";
 	interrupt-parent = <&gic>;
 	#address-cells = <2>;
 	#size-cells = <2>;
@@ -26,28 +27,28 @@ cpus {
 
 		cpu@0 {
 			device_type = "cpu";
-			compatible = "brcm,vulcan", "arm,armv8";
+			compatible = "cavium,thunder2", "brcm,vulcan", "arm,armv8";
 			reg = <0x0 0x0>;
 			enable-method = "psci";
 		};
 
 		cpu@1 {
 			device_type = "cpu";
-			compatible = "brcm,vulcan", "arm,armv8";
+			compatible = "cavium,thunder2", "brcm,vulcan", "arm,armv8";
 			reg = <0x0 0x1>;
 			enable-method = "psci";
 		};
 
 		cpu@2 {
 			device_type = "cpu";
-			compatible = "brcm,vulcan", "arm,armv8";
+			compatible = "cavium,thunder2", "brcm,vulcan", "arm,armv8";
 			reg = <0x0 0x2>;
 			enable-method = "psci";
 		};
 
 		cpu@3 {
 			device_type = "cpu";
-			compatible = "brcm,vulcan", "arm,armv8";
+			compatible = "cavium,thunder2", "brcm,vulcan", "arm,armv8";
 			reg = <0x0 0x3>;
 			enable-method = "psci";
 		};