perf test: Skip CoreSight tests if cs_etm// event is not available

CoreSight might be not available, in such case, skip the tests.

Signed-off-by: Michael Petlan <[e-mail]>
Reviewed-by: Leo Yan <[e-mail]>
Reviewed-by: Carsten Haitzler <[e-mail]>
Cc: [e-mail]
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Namhyung Kim <[e-mail]>

tools/perf/tests/shell/lib/coresight.sh

···
 BIN="$DIR/$TEST"
 # If the test tool/binary does not exist and is executable then skip the test
 if ! test -x "$BIN"; then exit 2; fi
+# If CoreSight is not available, skip the test
+perf list cs_etm | grep -q cs_etm || exit 2
 DATD="."
 # If the data dir env is set then make the data dir use that instead of ./
 if test -n "$PERF_TEST_CORESIGHT_DATADIR"; then