powerpc: Fix comment around arch specific definition of RECLAIM_DISTANCE

Commit 32e45ff43eaf5c17f changed the default value of RECLAIM_DISTANCE to 30. However the comment around arch specifc definition of RECLAIM_DISTANCE is not updated to reflect the same. Correct the value mentioned in the comment.

---

 arch/powerpc/include/asm/topology.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index c920215..356546d 100644
@@ -12,7 +12,7 @@ struct device_node;
  * Before going off node we want the VM to try and reclaim from the local
  * node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
  * With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
- * 20, we never reclaim and go off node straight away.
+ * 30, we never reclaim and go off node straight away.
  *
  * To fix this we choose a smaller value of RECLAIM_DISTANCE.
  */

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