drm/xe/query: Use kzalloc for drm_xe_query_engines

Use kzalloc like other routines for better consistency.

v2: Improve the subject(Matt)

Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240131051838.24705-1-nirmoy.das@intel.com