alpha: irq: Remove pointless irq status manipulation

The irq descriptors are initialized IRQ_DISABLED in the generic
code. No need to fiddle with them.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Matt Turner <mattst88@gmail.com>

arch/alpha/kernel/irq_alpha.c

@@ -228,14 +228,9 @@ struct irqaction timer_irqaction = {
 void __init
 init_rtc_irq(void)
 {
-	struct irq_desc *desc = irq_to_desc(RTC_IRQ);
-
-	if (desc) {
-		desc->status |= IRQ_DISABLED;
 	set_irq_chip_and_handler_name(RTC_IRQ, &no_irq_chip,
 				      handle_simple_irq, "RTC");
 	setup_irq(RTC_IRQ, &timer_irqaction);
-	}
 }
 
 /* Dummy irqactions.  */