libata: Add tracepoints

Add some tracepoints for ata_qc_issue, ata_qc_complete, and
ata_eh_link_autopsy.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --cc drivers/ata/Makefile
Simple merge

diff --cc drivers/ata/libata-core.c
Simple merge

diff --cc drivers/ata/libata-eh.c
Simple merge

diff --cc drivers/ata/libata-trace.c
Simple merge

diff --cc include/trace/events/libata.h
Simple merge