LU-3963 libcfs: convert link list to linux api fld,mdc,osc,mgc

LU-3963 libcfs: convert link list to linux api fld,mdc,osc,mgc

Convert part of the lustre client code over to the linux
list api. This covers the fld,mdc,osc,mgc layers.

Change-Id: I5a2d5de144e77eb85701dd942ad143cb99d8ea69
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Reviewed-on: http://review.whamcloud.com/9904
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>