irqchip: exynos: pass irq_base from platform

The platform code knows the IRQ base, while the irqchip driver
should really not. This is a littly hacky because we still
hardwire the IRQ base to 160 for the combiner in the DT case,
when we should really use -1. Removing that line will cause
a linear IRQ domain to be use, as we should.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index 4ba8cbe..3e72d03 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -70,7 +70,7 @@
 
 struct device_node;
 void combiner_init(void __iomem *combiner_base, struct device_node *np,
-			unsigned int max_nr);
+			unsigned int max_nr, int irq_base);
 
 extern struct smp_operations exynos_smp_ops;