dt-bindings: arm: vt8500: Add VIA APC Rock/Paper boards

dt-bindings: arm: vt8500: Add VIA APC Rock/Paper boards

APC Rock is a development board based on WonderMedia WM8950 SoC
released around 2013. Paper is the same as Rock but lacking a
VGA port and shipped with a recycled cardboard case.

While at that, put myself as the maintainer, given that Tony is
unavailable as of lately.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Link: https://lore.kernel.org/r/20250425-apc_paper_binding-v5-1-3aef49e97332@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>