NVIDIA Tegra Video Decoder Engine

Required properties:
- compatible : Must contain one of the following values:
   - "nvidia,tegra20-vde"
   - "nvidia,tegra30-vde"
   - "nvidia,tegra114-vde"
   - "nvidia,tegra124-vde"
   - "nvidia,tegra132-vde"
- reg : Must contain an entry for each entry in reg-names.
- reg-names : Must include the following entries:
  - sxe
  - bsev
  - mbe
  - ppe
  - mce
  - tfe
  - ppb
  - vdma
  - frameid
- iram : Must contain phandle to the mmio-sram device node that represents
         IRAM region used by VDE.
- interrupts : Must contain an entry for each entry in interrupt-names.
- interrupt-names : Must include the following entries:
  - sync-token
  - bsev
  - sxe
- clocks : Must include the following entries:
  - vde
- resets : Must contain an entry for each entry in reset-names.
- reset-names : Should include the following entries:
  - vde

Optional properties:
- resets : Must contain an entry for each entry in reset-names.
- reset-names : Must include the following entries:
  - mc
- iommus: Must contain phandle to the IOMMU device node.

Example:

video-codec@6001a000 {
	compatible = "nvidia,tegra20-vde";
	reg = <0x6001a000 0x1000 /* Syntax Engine */
	       0x6001b000 0x1000 /* Video Bitstream Engine */
	       0x6001c000  0x100 /* Macroblock Engine */
	       0x6001c200  0x100 /* Post-processing Engine */
	       0x6001c400  0x100 /* Motion Compensation Engine */
	       0x6001c600  0x100 /* Transform Engine */
	       0x6001c800  0x100 /* Pixel prediction block */
	       0x6001ca00  0x100 /* Video DMA */
	       0x6001d800  0x300 /* Video frame controls */>;
	reg-names = "sxe", "bsev", "mbe", "ppe", "mce",
		    "tfe", "ppb", "vdma", "frameid";
	iram = <&vde_pool>; /* IRAM region */
	interrupts = <GIC_SPI  9 IRQ_TYPE_LEVEL_HIGH>, /* Sync token interrupt */
		     <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>, /* BSE-V interrupt */
		     <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>; /* SXE interrupt */
	interrupt-names = "sync-token", "bsev", "sxe";
	clocks = <&tegra_car TEGRA20_CLK_VDE>;
	reset-names = "vde", "mc";
	resets = <&tegra_car 61>, <&mc TEGRA20_MC_RESET_VDE>;
	iommus = <&mc TEGRA_SWGROUP_VDE>;
};