x86, NUMA: Make numa_init_array() static

numa_init_array() no longer has users outside of numa.c.  Make it
static.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 56ed714..ecb5685 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -535,7 +535,7 @@
  * as the number of CPUs is not known yet. We round robin the existing
  * nodes.
  */
-void __init numa_init_array(void)
+static void __init numa_init_array(void)
 {
 	int rr, i;