Revert "selftests/resctrl: Use resctrl/info for feature detection"

This reverts commit 19eaad14 which is
ee041568

 upstream.

This commit is not a stable candidate and was backported without needed
dependencies that results in the resctrl tests unable to compile.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>