ASoC: msm: qdsp6v2: Userspace interaction cleanup

Compress ioctl function transfers data to/from userspace
and additionally implements logic to process ioctl command.
Ioctl function should delegate the processing to internal
functions for support compat mode.
This change moves the processing into internal function.

Change-Id: Id3a3cbd000ce319dcf2a01fa4eae941c042b2b37
Signed-off-by: Gopikrishnaiah Anandan <agopik@codeaurora.org>