drm/i915: hsw: replace !is_pch_edp() with port==PORT_A

On HSW the CPU side eDP is always on port-A, the PCH side eDP is always
on port-D.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -5969,7 +5969,7 @@ static int haswell_crtc_mode_set(struct drm_crtc *crtc,
 	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		switch (encoder->type) {
 		case INTEL_OUTPUT_EDP:
-			if (!intel_encoder_is_pch_edp(&encoder->base))
+			if (enc_to_dig_port(&encoder->base)->port == PORT_A)
 				is_cpu_edp = true;
 			break;
 		}