NXP LPC1850 ADC bindings

Required properties:
- compatible: Should be "nxp,lpc1850-adc"
- reg: Offset and length of the register set for the ADC device
- interrupts: The interrupt number for the ADC device
- clocks: The root clock of the ADC controller
- vref-supply: The regulator supply ADC reference voltage
- resets: phandle to reset controller and line specifier

Example:

adc0: adc@400e3000 {
	compatible = "nxp,lpc1850-adc";
	reg = <0x400e3000 0x1000>;
	interrupts = <17>;
	clocks = <&ccu1 CLK_APB3_ADC0>;
	vref-supply = <&reg_vdda>;
	resets = <&rgu 40>;
};