ARM: dts: am437x-gp-evm: Hook dcdc2 as the cpu0-supply

Hook dcdc2 as the cpu0-supply.
Signed-off-by: NDave Gerlach <d-gerlach@ti.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am437x-gp-evm.dts

@@ -975,3 +975,7 @@
 	clock-names = "ext-clk", "int-clk";
 	status = "okay";
 };
+
+&cpu {
+	cpu0-supply = <&dcdc2>;
+};