dt-bindings: lcdif: Properly describe the i.MX23 interrupts

i.MX23 has two LCDIF interrupts instead of a single one like other
i.MX devices.

Take this into account for properly describing the i.MX23 LCDIF
interrupts.

This fixes the following dt-schema warning:

imx23-olinuxino.dtb: lcdif@80030000: interrupts: [[46], [45]] is too long
        from schema $id: http://devicetree.org/schemas/display/fsl,lcdif.yaml#

Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231206112337.2234849-1-festevam@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>

Author: Fabio Estevam

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

@@ -51,7 +51,10 @@ properties:
     minItems: 1
 
   interrupts:
-    maxItems: 1
+    items:
+      - description: LCDIF DMA interrupt
+      - description: LCDIF Error interrupt
+    minItems: 1
 
   power-domains:
     maxItems: 1
@@ -131,6 +134,21 @@ allOf:
     then:
       required:
         - power-domains
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx23-lcdif
+    then:
+      properties:
+        interrupts:
+          minItems: 2
+          maxItems: 2
+    else:
+      properties:
+        interrupts:
+          maxItems: 1
 
 examples:
   - |