[ARM] 3686/1: ARM: arm/common: convert irq handling

Patch from Thomas Gleixner

From: Thomas Gleixner <tglx@linutronix.de>

Convert the files in arch/arm/common to use the generic
irq handling functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>