ARM: dts: am57xx-beagle-x15-common: Add cpu0 vdd supply

Add vdd-supply as smps12_reg for cpu0.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi

@@ -388,7 +388,7 @@ &gpio7 {
 };
 
 &cpu0 {
-	cpu0-supply = <&smps12_reg>;
+	vdd-supply = <&smps12_reg>;
 	voltage-tolerance = <1>;
 };