This adds user-friendly tracepoints with group id.

Link: https://lore.kernel.org/r/20201117165839.1643377-6-jaegeuk@kernel.orgReviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>