drm/i915: Convert some more bits to use engine mmio accessors

Remove a couple dev_priv locals as a consequence.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190607084521.16845-1-tvrtko.ursulin@linux.intel.com
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 2f85de0..193a938 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1219,7 +1219,7 @@ static void error_record_engine_registers(struct i915_gpu_state *error,
 	if (HAS_PPGTT(dev_priv)) {
 		int i;
 
-		ee->vm_info.gfx_mode = I915_READ(RING_MODE_GEN7(engine));
+		ee->vm_info.gfx_mode = ENGINE_READ(engine, RING_MODE_GEN7);
 
 		if (IS_GEN(dev_priv, 6)) {
 			ee->vm_info.pp_dir_base =