Blackfin arch: fix typo in early printk bit size processing

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

arch/blackfin/kernel/early_printk.c

@@ -105,10 +105,10 @@ static struct console * __init earlyserial_init(char *buf)
 		cflag |= CS5;
 		break;
 	case 6:
-		cflag |= CS5;
+		cflag |= CS6;
 		break;
 	case 7:
-		cflag |= CS5;
+		cflag |= CS7;
 		break;
 	default:
 		cflag |= CS8;