ARM: dts: omap: add missing unit name to pbias regulator nodes

This patch fixes the following DTC warnings:

"pbias_regulator 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>
diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index 2bd9c83..2d8e956 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -198,7 +198,7 @@
 					#size-cells = <1>;
 					ranges = <0 0x5a0 0x170>;
 
-					pbias_regulator: pbias_regulator {
+					pbias_regulator: pbias_regulator@60 {
 						compatible = "ti,pbias-omap4", "ti,pbias-omap";
 						reg = <0x60 0x4>;
 						syscon = <&omap4_padconf_global>;