tty/serial: add support for Xilinx PS UART

The Xilinx PS Uart is used on the new ARM based SoC. This
UART is not compatible with others such that a seperate
driver is required.

Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 758c5b0..95d479b 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -202,6 +202,9 @@
 /* VIA VT8500 SoC */
 #define PORT_VT8500	97
 
+/* Xilinx PSS UART */
+#define PORT_XUARTPS	98
+
 #ifdef __KERNEL__
 
 #include <linux/compiler.h>