ASoC: msm: Change RTAC to use ION memory

Change the RTAC driver to use shared memory for
Q6 communication. This is needed for calibration
parameters that use more then 4k of memory.

Change-Id: Ic6bdbeac04cc73e42139510c66a9ba919280c87a
Signed-off-by: Ben Romberger <bromberg@codeaurora.org>
Signed-off-by: flar2 <asegaert@gmail.com>