[ARM] 2933/1: S3C2410 - fix serial port warnings

Patch from Ben Dooks

Fix the following warnings produced from
drivers/char/s3c2410.c.
drivers/serial/s3c2410.c:757: warning: 'clk' may be used uninitialized
drivers/serial/s3c2410.c:756: warning: 'clksrc' may be used uninitialized
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/serial/s3c2410.c

@@ -753,8 +753,8 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
 {
 	struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
 	struct s3c24xx_uart_port *ourport = to_ourport(port);
-	struct s3c24xx_uart_clksrc *clksrc;
-	struct clk *clk;
+	struct s3c24xx_uart_clksrc *clksrc = NULL;
+	struct clk *clk = NULL;
 	unsigned long flags;
 	unsigned int baud, quot;
 	unsigned int ulcon;