ASoC: qcom: Add helper for allocating Soundwire stream runtime

Newer Qualcomm SoC soundcards will need to allocate Soundwire stream
runtime in their startup op.  The code will be exactly the same for all
soundcards, so add a helper for that.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231128165638.757665-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>