LU-3319 procfs: move llite proc handling over to seq_file

LU-3319 procfs: move llite proc handling over to seq_file

For lustre clients a special abstract layer so a lustre
client can be mounted. In order to support 3.10+ kernels
this client code being the llite,vvp,and clio layers proc
proc handling has been ported to using seq_files only.

Signed-off-by: James Simmons <uja.ornl@gmail.com>
Change-Id: Id2ac0956dbdf586ab1200e2edb00d489c15c5d50
Reviewed-on: http://review.whamcloud.com/7290
Tested-by: Jenkins
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>