Synaptics AS370 PDM capture DAI configuration

Required properties:
  - compatible : "syna,as370-pdmi"
  - interrupts : adhub irq number (dhub channel number)
  - interrupt-parent : dhub irq controller, see "syna,berlin-dhub-irq.txt"
  - reg : register address for pdm base, iosel, and pdmmic_sel
  - reg-names : "pdm_base", "sel_pdm", "pdmmic_sel"

Optional properties:
  - max-ch-inuse : define the max channel number actually used
  - rdlt : rise data latch time, delay cal with: clock_cycle*(rdlt+1).
	for example, sysclk=400MHz, and rdlt set to 3, then delay:
	(3+1) * (1/400MHz) = 10ns. If rdlt set to 7, then delay:
	(7+1) * (1/400MHz) = 20ns.
  - fdlt : fall data latch time, delay cal same as rdlt.

Example:
as370_pdmi: as370-pdmi {
	compatible = "syna,as370-pdmi";
	status = "disabled";
	interrupt-parent = <&dhubctr_a>;
	reg = <0x400c0 0x30>,
	      <0x4014c 0x4>,
	      <0x40160 0x4>;
	reg-names = "pdm_base",
		    "iosel_pdm",
		    "pdmmic_sel";
	interrupts = <0xA>;
	max-ch-inuse = <3>;
	rdlt = <0x3>;
	fdlt = <0x3>;
};