ARM: omap2plus: remove irq-related global base addresses

After the MULTI_IRQ_HANDLER conversion, a couple of global
variables can be removed.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm/mach-omap2/irq.c b/arch/arm/mach-omap2/irq.c
index ec52bee..42b1d65 100644
--- a/arch/arm/mach-omap2/irq.c
+++ b/arch/arm/mach-omap2/irq.c
@@ -149,6 +149,7 @@
 
 static void __init omap_init_irq(u32 base, int nr_irqs)
 {
+	void __iomem *omap_irq_base;
 	unsigned long nr_of_irqs = 0;
 	unsigned int nr_banks = 0;
 	int i, j;