drm/i915: Update render_state_init() to take a request structure

Updated the two render_state_init() functions to take a request pointer instead
of a ring. This removes their reliance on the OLR.

v2: Rebased to newer tree.

For: VIZ-5115
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Tomas Elf <tomas.elf@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 1b9b2c0..c5e42fc 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -750,7 +750,7 @@
 	if (ret != 0)
 		return ret;
 
-	ret = i915_gem_render_state_init(req->ring);
+	ret = i915_gem_render_state_init(req);
 	if (ret)
 		DRM_ERROR("init render state: %d\n", ret);