asoc: support non-runtime per-stream, per-device asm channel map

For non-typical channel number playback and capture, we need to
provide asm channel map info, otherwise pcm prepare will fail.

But there is no such default asm map info in audio drivers.

This change is to provide mechanism to set asm channel map, to
ununblock non-typical channel playback and capture.

Change-Id: Idad08c6f3f50b36f5c9c0a813bc0ef493cc57c59
Signed-off-by: Guodong Hu <guodhu@codeaurora.org>