[ARM] mmp2: add gpio initialization

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-mmp/common.h b/arch/arm/mach-mmp/common.h
index 85bf124..18c037f 100644
--- a/arch/arm/mach-mmp/common.h
+++ b/arch/arm/mach-mmp/common.h
@@ -9,6 +9,7 @@
 extern struct sys_timer mmp2_timer;
 extern void __init pxa168_init_irq(void);
 extern void __init pxa910_init_irq(void);
+extern void __init mmp2_init_icu(void);
 extern void __init mmp2_init_irq(void);
 
 extern void __init icu_init_irq(void);