drm/i915: distinguish between error messages in DIDL initialization

Two exactly same error messages on different error paths makes debugging
difficult. Clarify the messages and distinguish them from each other.
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Reviewed-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_opregion.c

@@ -312,7 +312,7 @@ static void intel_didl_outputs(struct drm_device *dev)
 	list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
 		if (i >= 8) {
 			dev_printk(KERN_ERR, &dev->pdev->dev,
-				    "More than 8 outputs detected\n");
+				   "More than 8 outputs detected via ACPI\n");
 			return;
 		}
 		status =
@@ -339,7 +339,7 @@ static void intel_didl_outputs(struct drm_device *dev)
 		int output_type = ACPI_OTHER_OUTPUT;
 		if (i >= 8) {
 			dev_printk(KERN_ERR, &dev->pdev->dev,
-				    "More than 8 outputs detected\n");
+				   "More than 8 outputs in connector list\n");
 			return;
 		}
 		switch (connector->connector_type) {