ARM: dts: Use ti,pbias compatible string for pbias

Use platform specific compatible strings instead of the common
"ti,pbias-omap" compatible string.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3.dtsi

@@ -203,7 +203,7 @@
 		};
 
 		pbias_regulator: pbias_regulator {
-			compatible = "ti,pbias-omap";
+			compatible = "ti,pbias-omap3", "ti,pbias-omap";
 			reg = <0x2b0 0x4>;
 			syscon = <&scm_conf>;
 			pbias_mmc_reg: pbias_mmc_omap2430 {