Blackfin serial driver: hook up our UARTs STP bit with userspaces CMSPAR

so we can now do spaced/marked parity

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 787dc71..aeb3cc2 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -629,6 +629,8 @@
 		lcr |= PEN;
 		if (!(termios->c_cflag & PARODD))
 			lcr |= EPS;
+		if (termios->c_cflag & CMSPAR)
+			lcr |= STP;
 	}
 
 	port->read_status_mask = OE;