ARM: ux500: DT: Rename root node "soc-u9500" into "soc"

This root node is used in the whole family of chips, the a9500
is just one particular instance. Nodes should be named after
the type of object rather than identity.
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NGabriel Fernandez <gabriel.fernandez@stericsson.com>
Reviewed-by: NPhilippe Langlais <philippe.langlais@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/ccu9540.dts

@@ -20,7 +20,7 @@
 		reg = <0x00000000 0x20000000>;
 	};
 
-	soc-u9500 {
+	soc {
 		uart@80120000 {
 			status = "okay";
 		};

arch/arm/boot/dts/dbx5x0.dtsi

@@ -12,7 +12,7 @@
 /include/ "skeleton.dtsi"
 
 / {
-	soc-u9500 {
+	soc {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "stericsson,db8500";

arch/arm/boot/dts/href.dtsi

@@ -27,7 +27,7 @@
 		};
 	};
 
-	soc-u9500 {
+	soc {
 		uart@80120000 {
 			status = "okay";
 		};

arch/arm/boot/dts/hrefprev60.dts

@@ -24,7 +24,7 @@
 		};
 	};
 
-	soc-u9500 {
+	soc {
 		prcmu@80157000 {
 			ab8500@5 {
 				ab8500-gpio {

arch/arm/boot/dts/hrefv60plus.dts

@@ -24,7 +24,7 @@
 		};
 	};
 
-	soc-u9500 {
+	soc {
 		i2c@80110000 {
 			bu21013_tp@0x5c {
 				reset-gpio = <&gpio4 15 0x4>;

arch/arm/boot/dts/snowball.dts

@@ -82,7 +82,7 @@
 		};
 	};
 
-	soc-u9500 {
+	soc {
 
 		sound {
 			compatible = "stericsson,snd-soc-mop500";

arch/arm/boot/dts/stuib.dtsi

@@ -10,7 +10,7 @@
  */
 
 / {
-	soc-u9500 {
+	soc {
 		i2c@80004000 {
 			stmpe1601: stmpe1601@40 {
 				compatible = "st,stmpe1601";