ARM: dts: imx6dl-b1x5v2: drop unsupported vcc-supply for MPL3115A2

The MPL3115A2 I2C pressure sensor driver does not take a VCC regulator.
The bindings are so far trivial, but the datasheet does not have a VCC
pin.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6dl-b1x5v2.dtsi

@@ -47,7 +47,6 @@ &i2c5 {
 	mpl3115a2: pressure-sensor@60 {
 		compatible = "fsl,mpl3115";
 		reg = <0x60>;
-		vcc-supply = <&reg_3v3_acm>;
 
 		/*
 		 * The MPL3115 interrupts are connected to pin 22 and 23