aml_audio_hal: Add master volume command tool [1/1]

PD#SWPL-13795

Problem:
Need add a master volume setting command.

Solution:
Add the command.

Verify:
Verified on AB301 with local build.
digital_mode 0
audio_client_test_ac3
While playing, change master volume with the command:
master_vol 0.5
master_vol 1.0
master_vol 0.0
....
And verify output volume is changed.

Change-Id: Ieaa472278535e709918702f477da77dc0ede42b1
2 files changed
tree: 1dfbb5a71721f3d2ee3bf677fa8b8596b5744c32
  1. include/
  2. src/
  3. Makefile