perf test: Fix test case 83 ('perf stat CSV output linter') on s390

Perf test case 83: perf stat CSV output linter might fail
on s390.
The reason for this is the output of the command

./perf stat -x, -A -a --no-merge true

which depends on a .config file setting. When CONFIG_SCHED_TOPOLOGY
is set, the output of above perf command is

CPU0,1.50,msec,cpu-clock,1502781,100.00,1.052,CPUs utilized

When CONFIG_SCHED_TOPOLOGY is *NOT* set the output of above perf
command is

0.95,msec,cpu-clock,949800,100.00,1.060,CPUs utilized

Fix the test case to accept both output formats.

Output before:
# perf test 83
83: perf stat CSV output linter : FAILED!
#

Output after:
# ./perf test 83
83: perf stat CSV output linter : Ok
#

Fixes: ec906102e5b7d339 ("perf test: Fix "perf stat CSV output linter" test on s390")
Signed-off-by: Thomas Richter <[e-mail]>
Acked-by: Ian Rogers <[e-mail]>
Acked-by: Sumanth Korikkar <[e-mail]>
Cc: Heiko Carstens <[e-mail]>
Cc: Sven Schnelle <[e-mail]>
Cc: Vasily Gorbik <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/tests/shell/stat+csv_output.sh

···
 
 function commachecker()
 {
-	local -i cnt=0 exp=0
+	local -i cnt=0
+	local exp=0
 
 	case "$1"
 	in "--no-args")		exp=6
···
 	;; "--interval")	exp=7
 	;; "--per-thread")	exp=7
 	;; "--system-wide-no-aggr")	exp=7
-				[ $(uname -m) = "s390x" ] && exp=6
+				[ $(uname -m) = "s390x" ] && exp='^[6-7]$'
 	;; "--per-core")	exp=8
 	;; "--per-socket")	exp=8
 	;; "--per-node")	exp=8
···
 		x=$(echo $line | tr -d -c ',')
 		cnt="${#x}"
 		# echo $line $cnt
-		[ "$cnt" -ne "$exp" ] && {
+		[[ ! "$cnt" =~ $exp ]] && {
 			echo "wrong number of fields. expected $exp in $line" 1>&2
 			exit 1;
 		}