* Renesas VSP2 Video Processing Engine

The VSP2 is a video processing engine that supports up-/down-scaling,
alpha blending, color space conversion and various other image processing features.
It can be found in the Renesas R-Car third generation SoCs.

Required properties:
  - compatible: Must contain "renesas,vsp2"

  - renesas,#rpf: Number of Read Pixel Formatter (RPF) modules in the VSP2.
  - renesas,#wpf: Number of Write Pixel Formatter (WPF) modules in the VSP2.

  VSP Manager sets reg, interrupts and clocks.

Optional properties:
  - renesas,#uds: Number of Up Down Scaler (UDS) modules in the VSP2. Defaults
    to 0 if not present.
  - renesas,has-bru: Boolean, indicates that Blend ROP Unit (BRU) module is
    available.
  - renesas,has-lut: Boolean, indicates that Look Up Table Unit (LUT) module is
    available. 
  - renesas,has-clu: Boolean, indicates that Cubic Look Up table Unit (CLU)
    module is available. 
  - renesas,has-hgo: Boolean, indicates that Histogram Generator One dimension
    Unit (HGO) module is available. 
  - renesas,has-hgo: Boolean, indicates that Histogram Generator TWo dimension
    Unit (HGT) module is available. 
  - renesas,#ch: Designation of the vspm channel number. Non-designation by
    default.

Example: R8A7795 (R-Car H3) VSP2 node

	vsp@fe960000 {
		compatible = "renesas,vspm-vsp2";
		reg = <0 0xfe960000 0 0x8000>;
		renesas,has-bru;
		renesas,#rpf = <5>;
		renesas,#uds = <0>;
		renesas,#wpf = <1>;
	};

	vsp@fe920000 {
		compatible = "renesas,vspm-vsp2";
		reg = <0 0xfe920000 0 0x8000>;
		renesas,has-bru;
		renesas,has-lut;
		renesas,has-clu;
		renesas,has-hgo;
		renesas,#rpf = <5>;
		renesas,#uds = <0>;
		renesas,#wpf = <1>;
	};

	vsp@fe9a0000 {
		compatible = "renesas,vspm-vsp2";
		reg = <0 0xfe9a0000 0 0x8000>;
		renesas,has-lut;
		renesas,has-clu;
		renesas,has-hgo;
		renesas,has-hgt;
		renesas,#rpf = <1>;
		renesas,#uds = <1>;
		renesas,#wpf = <1>;
	};

	vsp@fe9b0000 {
		compatible = "renesas,vspm-vsp2";
		reg = <0 0xfe9b0000 0 0x8000>;
		renesas,has-lut;
		renesas,has-clu;
		renesas,has-hgo;
		renesas,has-hgt;
		renesas,#rpf = <1>;
		renesas,#uds = <1>;
		renesas,#wpf = <1>;
	};

	vsp@fe9c0000 {
		compatible = "renesas,vspm-vsp2";
		reg = <0 0xfe9c0000 0 0x8000>;
		renesas,has-lut;
		renesas,has-clu;
		renesas,has-hgo;
		renesas,has-hgt;
		renesas,#rpf = <1>;
		renesas,#uds = <1>;
		renesas,#wpf = <1>;
	};

