dt-bindings: display: bcm2835-vec: Add BCM2711 compatible

The BCM2711 VEC uses a slightly different, incompatible, setup than the
one used for the earlier SoC. Add a new compatible for it.
Signed-off-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210520150344.273900-3-maxime@cerno.tech

Documentation/devicetree/bindings/display/brcm,bcm2835-vec.yaml

@@ -11,7 +11,9 @@ maintainers:
 
 properties:
   compatible:
-    const: brcm,bcm2835-vec
+    enum:
+      - brcm,bcm2711-vec
+      - brcm,bcm2835-vec
 
   reg:
     maxItems: 1