m68k/mac: Convert Mac to genirq

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
index 26c2b65..0a34b7a 100644
--- a/arch/m68k/mac/psc.c
+++ b/arch/m68k/mac/psc.c
@@ -18,6 +18,9 @@
 #include <linux/mm.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#ifdef CONFIG_GENERIC_HARDIRQS
+#include <linux/irq.h>
+#endif
 
 #include <asm/traps.h>
 #include <asm/bootinfo.h>