drm/xe/trace: Optimize trace definition

Make use of EVENT_CLASS to group similar trace events

Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Haridhar Kalvala <haridhar.kalvala@intel.com>
Link: https://lore.kernel.org/intel-xe/20231019093140.1901665-3-balasubramani.vivekanandan@intel.com/


Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>