Revert "ASoC: msm: qdsp6v2: Return error for invalid ioctl's"

This patch reverts commit c9c67fe5.
hwparams compat ioctl path was failing since platform driver was
returning an error. Platform driver should call pcm_lib layer of alsa
framework instead of returning invalid ioctl error.
This change fixes AMRNB recording usecase which was failing when hw
params ioctl was issued by userspace client.

CRs-fixed: 683867
Change-Id: Id17939d9803a4184649fde0afaef3fdce1ec1955
Signed-off-by: Gopikrishnaiah Anandan <agopik@codeaurora.org>