soundwire: qcom: Enable software clock gating requirement flag

Enable software clock gating flag in private data for SC7280
based platforms, which are soundwire 1.6.0 version based.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
[vkoul: fix patch subystem tag]
Link: https://lore.kernel.org/r/1656659827-27450-3-git-send-email-quic_srivasam@quicinc.com


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