ARM: prima2: staticize sirfsoc_init_late function

sirfsoc_init_late() is a local function not an extern interface to anyone.
Signed-off-by: Barry Song <Baohua.Song@csr.com>

arch/arm/mach-prima2/common.c

@@ -15,7 +15,7 @@
 #include <linux/of_platform.h>
 #include "common.h"
 
-void __init sirfsoc_init_late(void)
+static void __init sirfsoc_init_late(void)
 {
 	sirfsoc_pm_init();
 }