dt-bindings: media: cdns,csi2rx.yaml: Add optional interrupts for cdns-csi2rx

The Cadence CSI2RX IP exposes 2 interrupts [0] 12.7 camera subsystem.
So, add support for optional interrupts and interrupt-names properties.

[0]: http://www.ti.com/lit/pdf/spruil1

Acked-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Jai Luthra <[e-mail]>
Signed-off-by: Yemike Abhilash Chandra <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

Documentation/devicetree/bindings/media/cdns,csi2rx.yaml

···
   reg:
     maxItems: 1
 
+  interrupts:
+    maxItems: 2
+
+  interrupt-names:
+    items:
+      - const: error_irq
+      - const: irq
+
   clocks:
     items:
       - description: CSI2Rx system clock