ASoC: SOF: amd: Enable cont_update_posn variable in pcm hw_params.

Enable cont_update_posn variable to  update host position
in streambox for every dma copy.

Signed-off-by: V sujith kumar Reddy <Vsujithkumar.Reddy@amd.com>
Link: https://lore.kernel.org/r/20230308084509.1496256-3-Vsujithkumar.Reddy@amd.com


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