drm/i915: put the right cpu_transcoder into pipe_config for hw state readout

This hack is getting a bit messy, but this plugs the leak for now
until we have the cpu_transcoder properly pipe_config'ed.

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -7981,6 +7981,7 @@ intel_modeset_check_state(struct drm_device *dev)
 		     "(expected %i, found %i)\n", enabled, crtc->base.enabled);
 
 		memset(&pipe_config, 0, sizeof(pipe_config));
+		pipe_config.cpu_transcoder = crtc->config.cpu_transcoder;
 		active = dev_priv->display.get_pipe_config(crtc,
 							   &pipe_config);
 		WARN(crtc->active != active,