soundwire: qcom: add support to block packing mode

This patch adds support to block pack mode, which is required
on Qcom soundwire controllers v1.5.x on few ports!

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200917120138.11313-3-srinivas.kandagatla@linaro.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>