ARM: dts: STi: STiH407: Link CPU with its voltage supply

Used for Voltage Scaling using CPUFreq.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>

arch/arm/boot/dts/stih407-family.dtsi

@@ -35,6 +35,7 @@ cpu@0 {
 			clocks = <&clk_m_a9>;
 			clock-names = "cpu";
 			clock-latency = <100000>;
+			cpu0-supply = <&pwm_regulator>;
 		};
 		cpu@1 {
 			device_type = "cpu";