asoc: lahaina: add ch_mask check for CPS to avoid endless loop

When ch_mask is 0, set_cps_config will enter endless loop. Add
check for ch_mask to avoid such endless loop.

Change-Id: Id2237d4f8070b2edaf3bc9690afa649e82a455f8
Signed-off-by: Meng Wang <mengw@codeaurora.org>