ASoC: msm: qdspv2: Add tertiary MI2S ports support

APQ8096 target uses tertiary MI2S interface for
voice call. Add this support in routing driver.

CRs-fixed: 987739
Change-Id: Idecbe2f072e4315e180d25583b6d1b1237d06071
Signed-off-by: Deven Patel <cdevenp@codeaurora.org>