ARM: GIC: provide a single initialization function for boot CPU

Provide gic_init() which initializes the GIC distributor and current
CPU's GIC interface for the boot (or single) CPU.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-s5pv310/cpu.c b/arch/arm/mach-s5pv310/cpu.c
index 82ce4aa..bce3e91 100644
--- a/arch/arm/mach-s5pv310/cpu.c
+++ b/arch/arm/mach-s5pv310/cpu.c
@@ -123,8 +123,7 @@
 	int irq;
 
 	gic_cpu_base_addr = S5P_VA_GIC_CPU;
-	gic_dist_init(0, S5P_VA_GIC_DIST, IRQ_LOCALTIMER);
-	gic_cpu_init(0, S5P_VA_GIC_CPU);
+	gic_init(0, IRQ_LOCALTIMER, S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
 
 	for (irq = 0; irq < MAX_COMBINER_NR; irq++) {
 		combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),