dt-bindings: mmc: meson-gx: fix interrupt binding

Reflect in the binding that the cd interrupt is optional,
and add a description of the interrupts.

Fixes: 09b31a6 ("dt-bindings: mmc: meson-gx: support specifying cd interrupt")
Signed-off-by: Heiner Kallweit <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>

Author: hkallweit

Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml

@@ -28,7 +28,10 @@ properties:
     maxItems: 1
 
   interrupts:
-    maxItems: 2
+    minItems: 1
+    items:
+      - description: mmc controller instance
+      - description: card detect
 
   clocks:
     maxItems: 3