Blackfin Serial Driver: punt unused lsr variable

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 4e0b8cd..b773764 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -749,7 +749,7 @@
 	struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
 	unsigned long flags;
 	unsigned int baud, quot;
-	unsigned short val, ier, lsr, lcr = 0;
+	unsigned short val, ier, lcr = 0;
 
 	switch (termios->c_cflag & CSIZE) {
 	case CS8: