drm/amd/sched: print sched job id in amd_sched_job trace

This makes it easier to correlate amd_sched_job with with other trace
points that don't log the job pointer.

v2: don't print the sched_job pointer (Andres)

Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Andres Rodriguez <andresx7@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>