asoc: update channels and channel maps usage in channel mixer

Update channel mixer controls to use active channel maps.
Update channel maps and channel mixer control to validate
channels and frontend ids being used.

Change-Id: Id5a8d9d0f262fbf64dcfeb67a8b2195fb0d126fa
Signed-off-by: Dhananjay Kumar <dhakumar@codeaurora.org>