ASoC: pcm: Add support for fixup callback

Fixup callback is added for dai's which
do not follow the FE and BE convention
and is directly controlled by userspace
such as hostless dai's. This will restrict
the hw_params based on what is supported by
hardware rather than blindly setting what
is given by userspace.

Change-Id: I401c70ab5de1df10363ec808cb68f72d8d74af96
Signed-off-by: Anish Kumar <kanish@codeaurora.org>