This patch prints out TEST_COUNT for every tests in script simult_flows.sh.

The output looks like:

 01 balanced bwidth                          7411 max 8456       [ OK ]
 02 balanced bwidth - reverse direction      7380 max 8456       [ OK ]
 03 balanced bwidth with unbalanced delay    7434 max 8456       [ OK ]

Having test counters helps to quickly identify issues when looking at a
long list of output logs and results.

Signed-off-by: Geliang Tang <geliang.tang@linux.dev>
---
 tools/testing/selftests/net/mptcp/simult_flows.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/net/mptcp/simult_flows.sh b/tools/testing/selftests/net/mptcp/simult_flows.sh
index b2b31bb49543..8fa40bc0b37c 100755
--- a/tools/testing/selftests/net/mptcp/simult_flows.sh
+++ b/tools/testing/selftests/net/mptcp/simult_flows.sh
@@ -8,7 +8,7 @@ capture=false
 ksft_skip=4
 timeout_poll=30
 timeout_test=$((timeout_poll * 2 + 1))
-TEST_COUNT=1
+TEST_COUNT=0
 bail=0
 slack=50
 
@@ -221,7 +221,7 @@ run_test()
 	# completion (see mptcp_connect): 200ms on each side, add some slack
 	time=$((time + 400 + slack))
 
-	printf "%-60s" "$msg"
+	printf "%02u %-60s" "$((TEST_COUNT+1))" "$msg"
 	do_transfer $small $large $time
 	lret=$?
 	mptcp_lib_result_code "${lret}" "${msg}"
@@ -230,7 +230,7 @@ run_test()
 		[ $bail -eq 0 ] || exit $ret
 	fi
 
-	printf "%-60s" "$msg - reverse direction"
+	printf "%02u %-60s" "$((TEST_COUNT+1))" "$msg - reverse direction"
 	do_transfer $large $small $time
 	lret=$?
 	mptcp_lib_result_code "${lret}" "${msg}"
-- 
2.35.3