drm/radeon: Clean up errors in clearstate_cayman.h

Fix the following errors reported by checkpatch:

ERROR: open brace '{' following struct go on the same line

Signed-off-by: XueBing Chen <chenxb_99091@126.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/radeon: prepare header files for drmP.h removal

While removing drmP.h from all .c files the list of
header files are also sorted alphabetically.
To allow this adjust the header files to pull in
the dependencies they needed to allow this.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190608080241.4958-6-sam@ravnborg.org

drm/radeon: use NULL instead of zero in clearstate headers

Signed-off-by: Michele Curti <michele.curti@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/radeon: convert SI,CIK to use sumo_rlc functions

and remove duplicate si_rlc functions.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/radeon: properly set up the RLC on ON/LN/TN (v3)

This is required for certain advanced functionality.

v2: save/restore list takes dword offsets
v3: rebase on gpu reset changes

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>