drm/msm: atomic core bits

The core parts for async commit.

Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --cc drivers/gpu/drm/msm/Makefile
Simple merge

diff --cc drivers/gpu/drm/msm/msm_atomic.c
Simple merge

diff --cc drivers/gpu/drm/msm/msm_drv.c
Simple merge

diff --cc drivers/gpu/drm/msm/msm_drv.h
Simple merge