[PATCH] docs: serial: fix a reference file name in driver.rst

[Wan Jiabing]

Fix the following 'make refcheckdocs' warning:
Warning: Documentation/driver-api/serial/driver.rst references a file
that doesn't exist: Documentation/driver-api/serial/tty.rst

Signed-off-by: Wan Jiabing <wanjiabing@xxxxxxxx>
---
 Documentation/driver-api/serial/driver.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/driver-api/serial/driver.rst b/Documentation/driver-api/serial/driver.rst
index 31bd4e16fb1f..06ec04ba086f 100644
--- a/Documentation/driver-api/serial/driver.rst
+++ b/Documentation/driver-api/serial/driver.rst
@@ -311,7 +311,7 @@ hardware.
 	This call must not sleep
 
   set_ldisc(port,termios)
-	Notifier for discipline change. See Documentation/driver-api/serial/tty.rst.
+	Notifier for discipline change. See Documentation/tty/tty_ldisc.rst.
 
 	Locking: caller holds tty_port->mutex
 
-- 
2.35.1