ASoC: msm8996: Use slimbus cpu dai for cpe dai link

Change the CPE dai link to use the newly added slimbus CPU dai driver
for setting up data channel for look ahead bufering.

Change-Id: I3415497414fe44ba468ba19d4007d7d44f5c2511
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>