Input: mousedev - mark mousedev interfaces as non-seekable

Seeking does not make sense for mousedev, so let's use nonseekable_open()
to mark its devices as non-seekable.

Reviewed-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index 2baf32d..88b962a 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -576,6 +576,7 @@
 		goto err_free_client;
 
 	file->private_data = client;
+	nonseekable_open(inode, file);
 	return 0;
 
  err_free_client: