ASoC: msm8974: Update PCM MUX for 8974Pro variant

MSM8974Pro aa/ab/ac have different addresses for MUX register
which selects the same set of GPIO lines between PCM and MI2S
devices. Update PCM/MI2S MUX register addresses for MSM8974Pro

CRs-fixed: 563134
Change-Id: Icec7bcd77fe59f6f10474fd99aa2f37955d9afc1
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>