ASoc: msm8974: Add support for 4-ch recording

ASM channel mapping is hardcoded to match most used channel
config. Latter this needs to be corrected when user space has
a way to tell kernel audio driver stream channel mapping.

Change-Id: I0f68dcc2bde178ac8bf281e9442133e9b4d0909d
Signed-off-by: Kiran Kandi <kkandi@codeaurora.org>
5 files changed