ARM: dts: rockchip: add #sound-dai-cells to hdmi node no rk3036

'#sound-dai-cells' is required to properly interpret
the list of DAI specified in the 'sound-dai' property,
so add them to the 'hdmi' node for 'rk3036.dtsi'.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/55d302e5-c018-4b93-84c1-8cf75162e939@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>