ARM: CSR: timer: do not initialise statics to 0 or NULL

Signed-off-by: Barry Song <Baohua.Song@csr.com>
diff --git a/arch/arm/mach-prima2/timer.c b/arch/arm/mach-prima2/timer.c
index ed7ec48..225ed3b 100644
--- a/arch/arm/mach-prima2/timer.c
+++ b/arch/arm/mach-prima2/timer.c
@@ -133,7 +133,7 @@
 /* Overwrite weak default sched_clock with more precise one */
 unsigned long long notrace sched_clock(void)
 {
-	static int is_mapped = 0;
+	static int is_mapped;
 
 	/*
 	 * sched_clock is called earlier than .init of sys_timer