[ARM] 3181/1: add PORT_ identifier for Hilscher netx uart

Patch from Sascha Hauer

This patch adds PORT_NETX for supporting the Hilscher netx embedded
UARTs.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/linux/serial_core.h

@@ -121,6 +121,9 @@
 
 #define PORT_IP3106	70
 
+/* Hilscher netx */
+#define PORT_NETX	71
+
 #ifdef __KERNEL__
 
 #include <linux/config.h>