drm/i915: Remove connectors_active from intel_dp.c, v2.

Now that everything's atomic, checking encoder->base.crtc is enough.
This function doesn't have the locks to dereference crtc->state, but
stealing an encoder bound to any crtc is probably enough reason to warn.

Changes since v1:
- Commit message.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_dp.c

@@ -2627,7 +2627,7 @@ static void vlv_steal_power_sequencer(struct drm_device *dev,
 		DRM_DEBUG_KMS("stealing pipe %c power sequencer from port %c\n",
 			      pipe_name(pipe), port_name(port));
 
-		WARN(encoder->connectors_active,
+		WARN(encoder->base.crtc,
 		     "stealing pipe %c power sequencer from active eDP port %c\n",
 		     pipe_name(pipe), port_name(port));
 
@@ -4255,10 +4255,7 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
 
 	WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 
-	if (!intel_encoder->connectors_active)
-		return;
-
-	if (WARN_ON(!intel_encoder->base.crtc))
+	if (!intel_encoder->base.crtc)
 		return;
 
 	if (!to_intel_crtc(intel_encoder->base.crtc)->active)