can-calc-bit-timing: fix getopt typo: p -> q

Reported-by: Jon Neal <reportingsjr@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

can-calc-bit-timing.c

@@ -638,7 +638,7 @@ int main(int argc, char *argv[])
 
 	const struct calc_bittiming_const *btc;
 
-	while ((opt = getopt(argc, argv, "b:c:lps:")) != -1) {
+	while ((opt = getopt(argc, argv, "b:c:lqs:")) != -1) {
 		switch (opt) {
 		case 'b':
 			bitrate_nominal = atoi(optarg);