[PATCH -next] serial: stm32: Make stm32_get_databits static

Fix sparse warning:

drivers/tty/serial/stm32-usart.c:603:14: warning:
 symbol 'stm32_get_databits' was not declared. Should it be static?

Reported-by: Hulk Robot <redacted>
Signed-off-by: YueHaibing <redacted>
---
 drivers/tty/serial/stm32-usart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 9c2b04e..4517f2b 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c

@@ -600,7 +600,7 @@ static void stm32_shutdown(struct uart_port *port)
 	free_irq(port->irq, port);
 }
 
-unsigned int stm32_get_databits(struct ktermios *termios)
+static unsigned int stm32_get_databits(struct ktermios *termios)
 {
 	unsigned int bits;
 

-- 
2.7.4