m68k/irq: Add m68k_setup_irq_controller()

This is a wrapper around m68k_setup_irq_chip() that discards its dummy
second parameter, to ease the future transition to genirq.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/q40/q40ints.c b/arch/m68k/q40/q40ints.c
index cb245f9..a8a5ce8 100644
--- a/arch/m68k/q40/q40ints.c
+++ b/arch/m68k/q40/q40ints.c
@@ -82,7 +82,8 @@
 
 void __init q40_init_IRQ(void)
 {
-	m68k_setup_irq_chip(&q40_irq_chip, 1, Q40_IRQ_MAX);
+	m68k_setup_irq_controller(&q40_irq_chip, handle_simple_irq, 1,
+				  Q40_IRQ_MAX);
 
 	/* setup handler for ISA ints */
 	m68k_setup_auto_interrupt(q40_irq_handler);