Documentation: synopsys-dw-mshc: add binding for fifo quirks

* card-detect-delay: Delay in milli-seconds before detecting card after card

  insert event. The default value is 0.

* data-addr: Override fifo address with value provided by DT. The default FIFO reg

  offset is assumed as 0x100 (version < 0x240A) and 0x200(version >= 0x240A) by

  driver. If the controller does not follow this rule, please use this property

  to set fifo address in device tree.

* fifo-watermark-aligned: Data done irq is expected if data length is less than

  watermark in PIO mode. But fifo watermark is requested to be aligned with data

  length in some SoC so that TX/RX irq can be generated with data done irq. Add this

  watermark quirk to mark this requirement and force fifo watermark setting

  accordingly.

* vmmc-supply: The phandle to the regulator to use for vmmc.  If this is

  specified we'll defer probe until we can find this regulator.

		interrupts = <0 75 0>;

		#address-cells = <1>;

		#size-cells = <0>;

		data-addr = <0x200>;

		fifo-watermark-aligned;

		resets = <&rst 20>;

		reset-names = "reset";

	};