audio: add halplay help message [1/1]

PD#SWPL-79600

Problem:
no halplay help message support

Solution:
add halplay help message

Verify:
ap222-yocto

Change-Id: Ie843e156c692d010fe55905f5df7b36601f14aeb
Signed-off-by: zhaopeng.yan <zhaopeng.yan@amlogic.com>
1 file changed
tree: 28e1bd52f673f3c9ec7ead52c162c370f607565a
  1. include/
  2. src/
  3. Makefile