cherry-pick: factory_AudioLoop: use card index from given device names

BUG=chromium:298474
TEST=Manual specify hw:1,0 and make sure mixer settings
applies to correct audio card.

Change-Id: Id1eaf4623ace001d42707585e812c6bbc00d7aed
Original-Change-Id: Ie9e570f6221493cb45170d6f2f1475cb43a58022
Reviewed-on: https://chromium-review.googlesource.com/170902
Reviewed-by: Heng-ruey Hsu <henryhsu@chromium.org>
Commit-Queue: Hsinyu Chao <hychao@chromium.org>
Tested-by: Hsinyu Chao <hychao@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/170965
Reviewed-by: Hsinyu Chao <hychao@chromium.org>
Commit-Queue: Gediminas Ramanauskas <gedis@chromium.org>
Tested-by: Gediminas Ramanauskas <gedis@chromium.org>
1 file changed