ARM: dts: stm32: add required supplies of ov5640 in stm32mp157c-ev1

Correct the following warnings by adding the required supplies (AVDD, DVDD)
for the ov5640 node.

arch/arm/boot/dts/stm32mp157c-ev1.dtb: camera@3c: 'AVDD-supply' is a required property
From schema: Documentation/devicetree/bindings/media/i2c/ovti,ov5640.yaml
arch/arm/boot/dts/stm32mp157c-ev1.dtb: camera@3c: 'DVDD-supply' is a required property
From schema: Documentation/devicetree/bindings/media/i2c/ovti,ov5640.yaml

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

Author: Alain Volmat

arch/arm/boot/dts/stm32mp157c-ev1.dts

@@ -190,7 +190,9 @@
 		reg = <0x3c>;
 		clocks = <&clk_ext_camera>;
 		clock-names = "xclk";
+		AVDD-supply = <&v2v8>;
 		DOVDD-supply = <&v2v8>;
+		DVDD-supply = <&v2v8>;
 		powerdown-gpios = <&stmfx_pinctrl 18 (GPIO_ACTIVE_HIGH | GPIO_PUSH_PULL)>;
 		reset-gpios = <&stmfx_pinctrl 19 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
 		rotation = <180>;