[ARM] mmp: add support for Marvell MMP2

Marvell MMP2 (aka ARMADA610) is a SoC based on PJ4 core. It's
ARMv6 compatible.  Support basic interrupt handler and timer,
and basic support for MMP2 based FLINT platform.

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 c33fbbc..85bf124 100644
--- a/arch/arm/mach-mmp/common.h
+++ b/arch/arm/mach-mmp/common.h
@@ -6,8 +6,10 @@
 
 extern struct sys_timer pxa168_timer;
 extern struct sys_timer pxa910_timer;
+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_irq(void);
 
 extern void __init icu_init_irq(void);
 extern void __init pxa_map_io(void);