drm/msm: Add snapshot of SDE and supporting drivers

Snapshot of SDE driver.  This includes DRM SDE, DP, and DSI drivers,
v4l2 rotator driver, and clk driver for display plls.  Upstream changes
to drm/msm have been merged but require further fixes and validation
before enabling this driver.  Snapshot was taken from msm-4.9 as of:
commit f54b6540b397 ("wil6210: add proper locking in cfg suspend")

Change-Id: Ied16c0c33d1321c96f080bc7dafe0ab302657861
Signed-off-by: Steve Cohen <cohens@codeaurora.org>