Add device tree documentation for rk3576-nanopi-m5 Signed-off-by: John Clark <inindev@gmail.com> Acked-by: "Rob Herring (Arm)" <robh@kernel.org> Link: https://lore.kernel.org/r/20250628143229.74460-2-inindev@gmail.com Signed-off-by: Heiko Stuebner <heiko@sntech.de>