parisc: lay groundwork for killing __do_IRQ

Use proper accessors and handlers for generic irq cleanups. We just
call back into __do_IRQ through desc->handler now, and remove the
explicit calls.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
diff --git a/drivers/parisc/superio.c b/drivers/parisc/superio.c
index f7806d8..aceec6e 100644
--- a/drivers/parisc/superio.c
+++ b/drivers/parisc/superio.c
@@ -139,7 +139,7 @@
 	}
 
 	/* Call the appropriate device's interrupt */
-	__do_IRQ(local_irq);
+	generic_handle_irq(local_irq);
 
 	/* set EOI - forces a new interrupt if a lower priority device
 	 * still needs service.
@@ -363,9 +363,7 @@
 #endif
 
 	for (i = 0; i < 16; i++) {
-		struct irq_desc *desc = irq_to_desc(i);
-
-		desc->chip = &superio_interrupt_type;
+		set_irq_chip_and_handler(i, &superio_interrupt_type, parisc_do_IRQ);
 	}
 
 	/*