IB: Remove garbage non-ASCII characters from comments

A few files had 0xa0 characters in comments.  Remove them so that the 
files are clean ASCII text.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/core/multicast.c b/drivers/infiniband/core/multicast.c
index 1e13ab4..15b4c4d 100644
--- a/drivers/infiniband/core/multicast.c
+++ b/drivers/infiniband/core/multicast.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006 Intel Corporation.  All rights reserved.
+ * Copyright (c) 2006 Intel Corporation.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU