drm/xe/xe_pmu: Validate gt in event supported

Validate gt instead of checking gt_id is lesser
than max gts per tile

Signed-off-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20250630093741.2435281-1-riana.tauro@intel.com


Signed-off-by: Matt Roper <matthew.d.roper@intel.com>