CRAS: Add a new function to destroy node info arrays

Add a new function to destroy node info arrays. In addition, add
comments for the functions about node infos.

BUG=b:176570789
TEST=Verified the audio work fine

Change-Id: I8abb977b669780fa02e1d6959ac051b8354c9754
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/2719399
Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
Commit-Queue: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Tested-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
2 files changed