dt-bindings: gpu: v3d: Add BCM2711's compatible

BCM2711, Raspberry Pi 4's SoC, contains a V3D core. So add its specific
compatible to the bindings.

Signed-off-by: Nicolas Saenz Julienne <[e-mail]>
Signed-off-by: Peter Robinson <[e-mail]>
Reviewed-by: Stefan Wahren <[e-mail]>
Reviewed-by: Javier Martinez Canillas <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Signed-off-by: Melissa Wen <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml

···
 
   compatible:
     enum:
+      - brcm,2711-v3d
       - brcm,7268-v3d
       - brcm,7278-v3d