blackfin: serial driver

This patch implements the driver necessary use the Analog Devices Blackfin
processor's Serial Port.

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index aadbfd3..aa2653a 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -136,6 +136,9 @@
 /* Xilinx uartlite */
 #define PORT_UARTLITE	74
 
+/* Blackfin bf5xx */
+#define PORT_BFIN	75
+
 #ifdef __KERNEL__
 
 #include <linux/compiler.h>