LU-4423 libcfs: remove some unused code and wrappers in libcfs

LU-4423 libcfs: remove some unused code and wrappers in libcfs

Remove code that is not used by anyone anymore in the
libcfs module. Also simplify the code by removing
several one line wrappers. This is a collection of work
done upstream by Shraddha Barke. The linux commits are:

Linux-commit : 8eefa1c028f5b16f33ce1b3c7bbabdf74efc63b1
Linux-commit : d11f8cc4bb7ff4ee8cc89d2799cdda206da0f434
Linux-commit : 7fb6f46b14d01a185dfe563a8ba20cda514d4f9a
Linux-commit : 7cbf673d8b4a68916fe362fe9a9c3a55a604700e
Linux-commit : e4ce7f7779313ff23f958049b91cc7ac1b24d8e8
Linux-commit : 5a2f464af23bc90a77df6b9b30815e602efb99af
Linux-commit : 87af1d2e0c29ce4f025da0cdbb9c74a3958fd71d
Linux-commit : 9561c25c590afdcb27002dc168bcecbf5a757308
Linux-commit : 7d6e398ca61427e903246f1c11853f6f967bbb5e
Linux-commit : 90f8b4643023b23061a15229c0c0b8ee747438a8
Linux-commit : a2aadf23d1437ddcce86fa0673a6ecb5f932d3ec

Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change-Id: I667f98b3c73d4ac9e884d6ada6fed0733a3f6451
Reviewed-on: http://review.whamcloud.com/17375
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>