drm/i915: rip out indirection for pfit pipe_config assignment

This was still required a bit (on the cargo-cult side though) when the
state was stored in dev_priv, and when the enable/disable sequence was
botched a bit (to avoid too many updates).

But with pipeconfig we always get a clean slate, so this is pointless.
Rip it out.

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_panel.c

@@ -306,11 +306,8 @@ out:
 	if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18)
 		pfit_control |= PANEL_8TO6_DITHER_ENABLE;
 
-	if (pfit_control != pipe_config->gmch_pfit.control ||
-	    pfit_pgm_ratios != pipe_config->gmch_pfit.pgm_ratios) {
-		pipe_config->gmch_pfit.control = pfit_control;
-		pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
-	}
+	pipe_config->gmch_pfit.control = pfit_control;
+	pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
 	pipe_config->gmch_pfit.lvds_border_bits = border;
 }