[ARM] S3C: Add UDIVSLOT support for newer UARTS

Add support for the UDIVSLOT register on the newer UART blocks
which gives the capability of 1/16ths adjustment to the baud rate.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/drivers/serial/s3c6400.c b/drivers/serial/s3c6400.c
index 06936d1..3e37852 100644
--- a/drivers/serial/s3c6400.c
+++ b/drivers/serial/s3c6400.c
@@ -102,6 +102,7 @@
 	.name		= "Samsung S3C6400 UART",
 	.type		= PORT_S3C6400,
 	.fifosize	= 64,
+	.has_divslot	= 1,
 	.rx_fifomask	= S3C2440_UFSTAT_RXMASK,
 	.rx_fifoshift	= S3C2440_UFSTAT_RXSHIFT,
 	.rx_fifofull	= S3C2440_UFSTAT_RXFULL,