ARM: dts: msm: remove lpaif mode muxsel on sdm845

lpaif_mode_muxsel to select AUXPCM or I2S in LPASSis
not needed on SDM845. LPASS would select AUXPCM or I2S
according to afe port.
Remove the register value and register name in device
tree setting.

Change-Id: I23eed45f0c30bb2c1adfed2cff12247c2ac09007
Signed-off-by: Meng Wang <mwang@codeaurora.org>