arm: tegra: audio: add dt support for audience fw

arm: tegra: audio: add dt support for audience fw

Hawkeye and Loki use different mic tuning parameters and these params
are part of Audience firmware binary.

Updated Audience device tree node to store firmware binary name.
Driver will read FW binary info from DT and load appropriate firmware.

bug 1689236

Change-Id: I9baf8b081ad5c9e8922018a4a9fc6e731c54f61a
Signed-off-by: Srinivas Anne <sanne@nvidia.com>
Reviewed-on: http://git-master/r/803893
Reviewed-by: Sumit Bhattacharya <sumitb@nvidia.com>
Reviewed-by: Pierre Gervais <pgervais@nvidia.com>