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
(cherry picked from commit 262aea320f4766d2ec6f63f209f3ee419b549ad5)
Reviewed-on: http://git-master/r/807100
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sumit Bhattacharya <sumitb@nvidia.com>