media: dt-bindings: Document SAMA5D4 VDEC bindings

Add devicetree binding documentation for the Hantro G1/G2 VDEC on
the Microchip SAMAS5D4 SoC.
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/devicetree/bindings/media/microchip,sama5d4-vdec.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/media/microchip,sama5d4-vdec.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Hantro G1 VPU codec implemented on Microchip SAMA5D4 SoCs
+
+maintainers:
+  - Emil Velikov <emil.velikov@collabora.com>
+
+description:
+  Hantro G1 video decode accelerator present on Microchip SAMA5D4 SoCs.
+
+properties:
+  compatible:
+    const: microchip,sama5d4-vdec
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+        #include <dt-bindings/clock/at91.h>
+        #include <dt-bindings/interrupt-controller/irq.h>
+
+        vdec0: vdec@300000 {
+                compatible = "microchip,sama5d4-vdec";
+                reg = <0x00300000 0x100000>;
+                interrupts = <19 IRQ_TYPE_LEVEL_HIGH 4>;
+                clocks = <&pmc PMC_TYPE_PERIPHERAL 19>;
+        };