ACPI: Enable ACPI error messages w/o CONFIG_ACPI_DEBUG

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index 2dbb1b0..dab09d3 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -122,10 +122,7 @@
 	if (entry)
 		entry->proc_fops = &acpi_system_event_ops;
 	else {
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-				  "Unable to create '%s' proc fs entry\n",
-				  "event"));
-		error = -EFAULT;
+		error = -ENODEV;
 	}
 	return_VALUE(error);
 }