ARM: dts: exynos: Update I2S0 device node in exynos5433

The i2s0 node name is changed to a more generic "i2s" and missing
(optional) properties are added. The #sound-dai-cells property is
required for HDMI audio support on TM2 board.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>