ASoC: SOF: compress: Add copy function for capture case

Added a new copy function used to copy data to user buffer
in the case of compress capture.

Reviewed-by: Paul Olaru <paul.olaru@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Link: https://lore.kernel.org/r/20220822101502.17644-3-laurentiu.mihalcea@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>