tests: Fix ap_wpa2_eap_fast_prf_oom with the updated PRF implementation

This is needed to work with the tls_openssl.c changes that renamed the
function that is used for deriving the EAP-FAST keys.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

tests/hwsim/test_ap_eap.py

@@ -3399,7 +3399,7 @@ def test_ap_wpa2_eap_fast_prf_oom(dev, apdev):
     check_eap_capa(dev[0], "FAST")
     tls = dev[0].request("GET tls_library")
     if tls.startswith("OpenSSL"):
-        func = "openssl_tls_prf"
+        func = "tls_connection_get_eap_fast_key"
         count = 2
     elif tls.startswith("internal"):
         func = "tls_connection_prf"