linux-phytec-ti

ARM: dts: rockchip: Add SPDIF optical out on Radxa Rock

This enables the SPDIF optical audio output on the Radxa Rock

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>