soc: swr-mstr-ctrl: Move to CPU-1 FIFO for swr register read/write

Both APSS and ADSP are accessing CPU-0 FIFO when CPS is enabled
during speaker playback. This causes underflow issue when accessing
wsa register from APSS. Move APSS to CPU-1 FIFO to resolve underflow
issue.

Change-Id: I5ed9143bc78757468fbe4bcc686196149ca521f2
Signed-off-by: Meng Wang <mengw@codeaurora.org>