drm:msm: Update API define of msm_drm

Add the following IOCTL commands to support GPU multi-context and
preemption.
DRM_MSM_CONTEXT_CREATE/DRM_MSM_CONTEXT_DESTROY, for draw context.
DRM_MSM_WAIT_TIMESTAMP will be used instead of DRM_MSM_WAIT_FENCE
DRM_MSM_READ_TIMESTAMP
DRM_MSM_CONTEXT_SUBMIT will be used instead of DRM_MSM_SUBMIT.
DRM_MSM_GEM_CLOSE

Change-Id: Icd68b2b6417c68b645e80ff09453647c23a511a4
Signed-off-by: Kasin Li <donglil@codeaurora.org>
Signed-off-by: Yajun Li <yajunl@codeaurora.org>