LU-6245 libcfs: cleanup list handling

LU-6245 libcfs: cleanup list handling

For the kernel space side we should use list.h directly
expect in the case of kernel API changes that impact us
then we use linux-list.h that handles those API changes.
A few of the user land utilities use a list implementation
so we provide a separate list implementation for the
libcfs library.

Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Change-Id: I1280d74a629dbaa9c11a3c506fd635fab99ce182
Reviewed-on: http://review.whamcloud.com/15200
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>