x86, NUMA: trivial cleanups

* Kill no longer used struct bootnode.

* Kill dangling declaration of pxm_to_nid() in numa_32.h.

* Make setup_node_bootmem() 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>

arch/x86/include/asm/numa_64.h

@@ -3,18 +3,11 @@
 
 #include <linux/nodemask.h>
 
-struct bootnode {
-	u64 start;
-	u64 end;
-};
-
 #define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
 
 extern int numa_off;
 
 extern unsigned long numa_free_all_bootmem(void);
-extern void setup_node_bootmem(int nodeid, unsigned long start,
-			       unsigned long end);
 
 #ifdef CONFIG_NUMA
 /*