[PATCH] use irqreturn_t in m68knommu/5249 config.c

Fix up interrupt handler type to be irqreturn_t.

arch/m68knommu/platform/5249/config.c

@@ -26,7 +26,7 @@
 /***************************************************************************/
 
 void coldfire_tick(void);
-void coldfire_timer_init(void (*handler)(int, void *, struct pt_regs *));
+void coldfire_timer_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
 unsigned long coldfire_timer_offset(void);
 void coldfire_trap_init(void);
 void coldfire_reset(void);