media: dt-bindings: media: sun6i: Add A31 and H3 compatibles

The H3 has a slightly different CSI controller (no BT656, no CCI) which
looks a lot like the original A31 controller. Add a compatible for the A31,
and more specific compatible the for the H3 to be used in combination for
the A31.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Documentation/devicetree/bindings/media/sun6i-csi.txt

@@ -4,7 +4,10 @@ Allwinner V3s Camera Sensor Interface
 Allwinner V3s SoC features a CSI module(CSI1) with parallel interface.
 
 Required properties:
-  - compatible: value must be "allwinner,sun8i-v3s-csi"
+  - compatible: value must be one of:
+    * "allwinner,sun6i-a31-csi"
+    * "allwinner,sun8i-h3-csi", "allwinner,sun6i-a31-csi"
+    * "allwinner,sun8i-v3s-csi"
   - reg: base address and size of the memory-mapped region.
   - interrupts: interrupt associated to this IP
   - clocks: phandles to the clocks feeding the CSI