[MIPS] Add GT641xx IRQ routines.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/cobalt/serial.c b/arch/mips/cobalt/serial.c
index 08e7397..53b8d0d 100644
--- a/arch/mips/cobalt/serial.c
+++ b/arch/mips/cobalt/serial.c
@@ -24,6 +24,7 @@
 #include <linux/serial_8250.h>
 
 #include <cobalt.h>
+#include <irq.h>
 
 static struct resource cobalt_uart_resource[] __initdata = {
 	{
@@ -32,15 +33,15 @@
 		.flags	= IORESOURCE_MEM,
 	},
 	{
-		.start	= COBALT_SERIAL_IRQ,
-		.end	= COBALT_SERIAL_IRQ,
+		.start	= SERIAL_IRQ,
+		.end	= SERIAL_IRQ,
 		.flags	= IORESOURCE_IRQ,
 	},
 };
 
 static struct plat_serial8250_port cobalt_serial8250_port[] = {
 	{
-		.irq		= COBALT_SERIAL_IRQ,
+		.irq		= SERIAL_IRQ,
 		.uartclk	= 18432000,
 		.iotype		= UPIO_MEM,
 		.flags		= UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,