[ARM] mmp: rename pxa_map_io() to mmp_map_io()

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 b4a0ba0..9696175 100644
--- a/arch/arm/mach-mmp/common.h
+++ b/arch/arm/mach-mmp/common.h
@@ -14,4 +14,4 @@
 extern void __init mmp2_init_irq(void);
 
 extern void __init icu_init_irq(void);
-extern void __init pxa_map_io(void);
+extern void __init mmp_map_io(void);