alpha: kill off alpha_do_IRQ

Good riddance... Nuke a pile of redundant handlers that the
generic code takes care of as well.

Tested-by: Michael Cree <mcree@orcon.net.nz>
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
diff --git a/arch/alpha/kernel/sys_sable.c b/arch/alpha/kernel/sys_sable.c
index ed88315..5c4423d 100644
--- a/arch/alpha/kernel/sys_sable.c
+++ b/arch/alpha/kernel/sys_sable.c
@@ -474,20 +474,6 @@
 #endif
 }
 
-static unsigned int
-sable_lynx_startup_irq(unsigned int irq)
-{
-	sable_lynx_enable_irq(irq);
-	return 0;
-}
-
-static void
-sable_lynx_end_irq(unsigned int irq)
-{
-	if (!(irq_to_desc(irq)->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-		sable_lynx_enable_irq(irq);
-}
-
 static void
 sable_lynx_mask_and_ack_irq(unsigned int irq)
 {
@@ -503,12 +489,9 @@
 
 static struct irq_chip sable_lynx_irq_type = {
 	.name		= "SABLE/LYNX",
-	.startup	= sable_lynx_startup_irq,
-	.shutdown	= sable_lynx_disable_irq,
-	.enable		= sable_lynx_enable_irq,
-	.disable	= sable_lynx_disable_irq,
-	.ack		= sable_lynx_mask_and_ack_irq,
-	.end		= sable_lynx_end_irq,
+	.unmask		= sable_lynx_enable_irq,
+	.mask		= sable_lynx_disable_irq,
+	.mask_ack	= sable_lynx_mask_and_ack_irq,
 };
 
 static void 
@@ -537,7 +520,7 @@
 	for (i = 0; i < nr_of_irqs; ++i) {
 		irq_to_desc(i)->status |= IRQ_LEVEL;
 		set_irq_chip_and_handler(i, &sable_lynx_irq_type,
-			alpha_do_IRQ);
+			handle_level_irq);
 	}
 
 	common_init_isa_dma();