IB: Whitespace fixes

Remove some trailing whitespace that has snuck in despite the best
efforts of whitespace=error-all.  Also fix a few other whitespace
bogosities.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/Kconfig

@@ -14,7 +14,7 @@ config INFINIBAND_USER_MAD
 	---help---
 	  Userspace InfiniBand Management Datagram (MAD) support.  This
 	  is the kernel side of the userspace MAD support, which allows
-	  userspace processes to send and receive MADs. You will also 
+	  userspace processes to send and receive MADs. You will also
 	  need libibumad from <http://www.openib.org>.
 
 config INFINIBAND_USER_ACCESS