Migrate mpq demux driver from kernel 4.4 to 4.9

This change migrates all the relevant files consisting of the mpq
demux driver and its plugins, including the addition of TSPPv1 HW driver.

The snapshot is taken as of msm-4.4,
'commit a74dd0fdc772 ("mmc: core: retune after un-gating the clocks")'

In addition, introduce a few code changes to reduce checkpatch
warnings, typos and other style issues.

Change-Id: Ic42821da2d1d27803df2a2c8ed785f0558ffaebf
Signed-off-by: Udaya Bhaskara Reddy Mallavarapu <udaym@codeaurora.org>