drm/msm: snapshot of drm msm display and drm from 4.14 to 4.19

This change ports drm msm display and drm framework changes from 4.14 to
4.19 as of commit 5cc0f9c4 ("drivers: net: rmnet: introduce
rmnet traces"). Additionally, in order for these changes to compile
there were additional minor changes to SDE and DP files required.

Change-Id: I79d963a66600fdb40a43425d4c208d9a4b7dd91d
Signed-off-by: Samantha Tran <samtran@codeaurora.org>