ARM: dts: omap3/am4372: add missing unit name to ocp node

This patch fixes the following DTC warnings for many boards:

"Node /ocp has a reg or ranges property, but no unit name"
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am3517.dtsi

@@ -15,7 +15,7 @@ aliases {
 		serial3 = &uart4;
 	};
 
-	ocp {
+	ocp@68000000 {
 		am35x_otg_hs: am35x_otg_hs@5c040000 {
 			compatible = "ti,omap3-musb";
 			ti,hwmods = "am35x_otg_hs";

arch/arm/boot/dts/am4372.dtsi

@@ -132,7 +132,7 @@ l2-cache-controller@48242000 {
 		cache-level = <2>;
 	};
 
-	ocp {
+	ocp@44000000 {
 		compatible = "ti,am4372-l3-noc", "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;

arch/arm/boot/dts/omap3.dtsi

@@ -78,7 +78,7 @@ dsp {
 	 * the moment, just use a fake OCP bus entry to represent the whole bus
 	 * hierarchy.
 	 */
-	ocp {
+	ocp@68000000 {
 		compatible = "ti,omap3-l3-smx", "simple-bus";
 		reg = <0x68000000 0x10000>;
 		interrupts = <9 10>;

arch/arm/boot/dts/omap34xx.dtsi

@@ -28,7 +28,7 @@ cpu@0 {
 		};
 	};
 
-	ocp {
+	ocp@68000000 {
 		omap3_pmx_core2: pinmux@480025d8 {
 			compatible = "ti,omap3-padconf", "pinctrl-single";
 			reg = <0x480025d8 0x24>;

arch/arm/boot/dts/omap36xx.dtsi

@@ -30,7 +30,7 @@ cpu@0 {
 		};
 	};
 
-	ocp {
+	ocp@68000000 {
 		uart4: serial@49042000 {
 			compatible = "ti,omap3-uart";
 			reg = <0x49042000 0x400>;