media: dt-bindings: ov8856: decouple lanes and link frequency from driver

The data lanes and link frequency were set to match existing Linux driver
limitations, however bindings should be independent of chosen Linux
driver support.

Decouple these properties from the driver to match what is actually
supported by the hardware.

This also fixes DTS example:

  ov8856.example.dtb: camera@10: port:endpoint:link-frequencies:0: [360000000] is too short

Fixes: 066a94e2 ("media: dt-bindings: media: Use graph and video-interfaces schemas")
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Documentation/devicetree/bindings/media/i2c/ov8856.yaml

@@ -67,19 +67,17 @@ properties:
 
         properties:
           data-lanes:
-            description: |-
-              The driver only supports four-lane operation.
-            items:
-              - const: 1
-              - const: 2
-              - const: 3
-              - const: 4
-
-          link-frequencies:
-            description: Frequencies listed are driver, not h/w limitations.
-            maxItems: 2
-            items:
-              enum: [ 360000000, 180000000 ]
+            oneOf:
+              - items:
+                  - const: 1
+              - items:
+                  - const: 1
+                  - const: 2
+              - items:
+                  - const: 1
+                  - const: 2
+                  - const: 3
+                  - const: 4
 
         required:
           - link-frequencies