[PATCH] s2io build fix

sparc32:

drivers/net/s2io.c:2636: warning: implicit declaration of function 'disable_irq'
drivers/net/s2io.c:2656: warning: implicit declaration of function 'enable_irq'

Cc: Ananda Raju <Ananda.Raju@neterion.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/net/s2io.c

@@ -71,6 +71,7 @@
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/div64.h>
+#include <asm/irq.h>
 
 /* local include */
 #include "s2io.h"