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>

arch/m68k/atari/ataints.c

@@ -374,7 +374,8 @@ static struct irq_chip atari_irq_chip = {
 void __init atari_init_IRQ(void)
 {
 	m68k_setup_user_interrupt(VEC_USER, NUM_ATARI_SOURCES - IRQ_USER, NULL);
-	m68k_setup_irq_chip(&atari_irq_chip, 1, NUM_ATARI_SOURCES - 1);
+	m68k_setup_irq_controller(&atari_irq_chip, handle_simple_irq, 1,
+				  NUM_ATARI_SOURCES - 1);
 
 	/* Initialize the MFP(s) */