parisc: convert iosapic interrupts to proper flow handlers

Shift the ->end call (cpu eoi) from __do_IRQ into our
unmask handler. Also nuke some redundant code.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 13bfa97..e873eda 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -241,7 +241,7 @@
 
 	/* for iosapic interrupts */
 	if (type) {
-		set_irq_chip_and_handler(irq, type, parisc_do_IRQ);
+		set_irq_chip_and_handler(irq, type, handle_level_irq);
 		set_irq_chip_data(irq, data);
 		cpu_unmask_irq(irq);
 	}