linux-phytec-fsl

ASoC: rt5645: add device tree support

Modify the RT5645 driver to parse platform data from device tree.
Write a DT binding document to describe those properties.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>