ASoC: msm: spdif rx driver changes

New hardware for spdif rx has been added in mpq8092.
The changes register the platform driver and dai driver
for spdif rx. Add support in afe for the dai driver
to send clock configuration, channel status configuration
and spdif port configuration information and start the
spdif rx port. The changes enable PCM Audio playback
over spdif rx.

Change-Id: I70a30c8485a0abb1d248fe509d5b66a926997f88
Signed-off-by: Aravind Kumar <akumark@codeaurora.org>