LU-8066 osc: move suitable values from procfs to sysfs

LU-8066 osc: move suitable values from procfs to sysfs

All single-value controls are moved from /proc/fs/lustre/osc/.../
to /sys/fs/lustre/osc/.../

Linux-commit : aab38b00ac19347bf982cf42c71aab14a9301dee

Change-Id: I69744804bc424ab171da8f649336a3ad450f0d05
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/30962
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>