dt-bindings: net: dsa: realtek: add reset controller

Realtek switches can use a reset controller instead of reset-gpios.

Signed-off-by: Luiz Angelo Daros de Luca <[e-mail]>
Cc: [e-mail]
Acked-by: Arınç ÜNAL <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Reviewed-by: Alvin Šipraga <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

Documentation/devicetree/bindings/net/dsa/realtek.yaml

···
     description: GPIO to be used to reset the whole device
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
   realtek,disable-leds:
     type: boolean
     description: |