Input: uinput - mark as non-seekable

Seeking does not make sense for uinput so let's use nonseekable_open
to mark the device non-seekable.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 18206e1..1477466 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -290,6 +290,7 @@
 	newdev->state = UIST_NEW_DEVICE;
 
 	file->private_data = newdev;
+	nonseekable_open(inode, file);
 
 	return 0;
 }