arm64: dts: renesas: falcon-csi-dsi: Set bus-type for MAX96712

Specify the bus-type property for all three connected MAX96712.

The default behavior when parsing a node without this property is to
default to D-PHY.  Making this explicit plays it safe and future proofs
things as the default parsing comes from the V4L2 core and not the
driver itself.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230331141431.3820311-1-niklas.soderlund+renesas@ragnatech.se


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>