This patch adds some common helper functions like translating dsp error to linux error codes and channel mappings etc. These functions are used in all the following qdsp6 drivers. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Reviewed-and-tested-by: Rohit kumar <rohitkr@codeaurora.org> Reviewed-by: Banajit Goswami <bgoswami@codeaurora.org> Signed-off-by: Mark Brown <broonie@kernel.org>