ARM: dts: am43x-epos-evm: Hook dcdc2 as the cpu0-supply

Hook dcdc2 as the cpu0-supply.
Signed-off-by: NDave Gerlach <d-gerlach@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am43x-epos-evm.dts

@@ -991,3 +991,7 @@
 	assigned-clocks = <&mux_synctimer32k_ck>;
 	assigned-clock-parents = <&clkdiv32k_ick>;
 };
+
+&cpu {
+	cpu0-supply = <&dcdc2>;
+};