LU-5844 get rid of IOC_LIBCFS_MEMHOG and IOC_LIBCFS_PANIC ioctls

LU-5844 get rid of IOC_LIBCFS_MEMHOG and IOC_LIBCFS_PANIC ioctls

Removing unused IOC_LIBCFS_MEMHOG and IOC_LIBCFS_PANIC ioctls
from the libcfs/ lnet/ code. This cleanup allows us to remove
the cfs_psdev abstraction.

Change-Id: Ifa9b444279f10f0dedf6e31d9f55a5c8cdc6f1af
Signed-off-by: Parinay Kondekar <parinay.kondekar@seagate.com>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: http://review.whamcloud.com/17492
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
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>