ssl-opt.sh: Fix early data test option

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/opt-testcases/tls13-misc.sh b/tests/opt-testcases/tls13-misc.sh
index 90c0fb2..066fa3f 100755
--- a/tests/opt-testcases/tls13-misc.sh
+++ b/tests/opt-testcases/tls13-misc.sh
@@ -543,7 +543,7 @@
                              MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED
 run_test "TLS 1.3 m->m: Ephemeral over PSK kex with early data enabled" \
          "$P_SRV force_version=tls13 debug_level=4 max_early_data_size=1024" \
-         "$P_CLI debug_level=4 early_data=$EARLY_DATA_INPUT tls13_kex_modes=psk_or_ephemeral reco_mode=1 reconnect=1" \
+         "$P_CLI debug_level=4 early_data=1 tls13_kex_modes=psk_or_ephemeral reco_mode=1 reconnect=1" \
          0 \
          -s "key exchange mode: ephemeral" \
          -S "key exchange mode: psk" \