dt-bindings: lcdif: Fix constraints for imx8mp

i.MX8MP uses 3 clocks, so soften the restrictions for clocks & clock-names.
This SoC requires a power-domain for this peripheral to use. Add it as
a required property.

Fixes: f5419cb0 ("dt-bindings: lcdif: Add compatible for i.MX8MP")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20221208140840.3227035-1-alexander.stein@ew.tq-group.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/display/fsl,lcdif.yaml

@@ -52,6 +52,9 @@ properties:
   interrupts:
     maxItems: 1
 
+  power-domains:
+    maxItems: 1
+
   port:
     $ref: /schemas/graph.yaml#/properties/port
     description: The LCDIF output port
@@ -81,7 +84,31 @@ allOf:
           maxItems: 3
       required:
         - clock-names
-    else:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8mp-lcdif
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+        clock-names:
+          minItems: 3
+          maxItems: 3
+      required:
+        - clock-names
+        - power-domains
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - fsl,imx6sx-lcdif
+                - fsl,imx8mp-lcdif
+    then:
       properties:
         clocks:
           maxItems: 1