[IA64-SGI] bte_copy nasid_index fix

The nasid_index was not being incremented if the
pointer was null, causing an infinite loop.

Signed-off-by: Russ Anderson (rja@sgi.com)
Signed-off-by: NTony Luck <tony.luck@intel.com>

arch/ia64/sn/kernel/bte.c

@@ -137,6 +137,7 @@ bte_result_t bte_copy(u64 src, u64 dest, u64 len, u64 mode, void *notification)
 			bte = bte_if_on_node(nasid_to_try[nasid_index],bte_if_index);
 
 			if (bte == NULL) {
+				nasid_index++;
 				continue;
 			}