drm/i915: check for the PCH when setting pch_transcoder

Don't check the CPU, it doesn't have any PCH transcoder.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7f1b07c..fa73b4a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1789,7 +1789,7 @@
 	int reg;
 	u32 val;
 
-	if (IS_HASWELL(dev_priv->dev))
+	if (HAS_PCH_LPT(dev_priv->dev))
 		pch_transcoder = TRANSCODER_A;
 	else
 		pch_transcoder = pipe;