ttyprintk: remove redundant initialization of variable ret

The variable ret is being initialized with a value that is never read
and it is being updated later with a new value.  The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200611153108.927614-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/char/ttyprintk.c

@@ -172,7 +172,7 @@ static struct tty_driver *ttyprintk_driver;
 
 static int __init ttyprintk_init(void)
 {
-	int ret = -ENOMEM;
+	int ret;
 
 	spin_lock_init(&tpk_port.spinlock);