ASoC: Add utility to parse DAPM routes from device tree
Implement snd_soc_of_parse_audio_routing(), a utility function that can parses a simple DAPM route table from device tree.The machine driver specifies the DT property to use, since this is binding-specific. Signed-off-by: NStephen Warren <swarren@nvidia.com> Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
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