Add engines sysfs directory under its GT and
create sub directory for all engine class
(note its not per instance) present on GT.

For example,
DUT# cat /sys/class/drm/cardX/device/tileN/gtN/engines/
bcs/ ccs/

V9 :
   - Add missing drmm_add_action_or_reset
V8 :
   - Rebase
V7 :
   - Remove xe_gt.h from .h and include in .c - Matt
V6 :
   - Add kernel doc and arrange file in make file by alphabet - Matt
V5 :
   - replace xe_engine with xe_hw_engine - Matt
V4 :
   - Rebase to resolve conflicts - CI
V3 :
   - Move code in its own file
   - Rename API name
V2 :
   - Correct class mask logic - Himal
   - Remove extra parenthesis
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>