Fix eap_example build with renamed EAP_* server defines

1e5839e06f renamed the defines for EAP
server, but did not update the eap_example Makefile to match. This
broke the server side of the EAP example (no methods were actually
enabled).

eap_example/Makefile

@@ -81,6 +81,17 @@ CFLAGS += -DEAP_SAKE
 CFLAGS += -DEAP_GPSK -DEAP_GPSK_SHA256
 CFLAGS += -DEAP_TLS_FUNCS
 
+CFLAGS += -DEAP_SERVER_TLS
+CFLAGS += -DEAP_SERVER_PEAP
+CFLAGS += -DEAP_SERVER_TTLS
+CFLAGS += -DEAP_SERVER_MD5
+CFLAGS += -DEAP_SERVER_MSCHAPV2
+CFLAGS += -DEAP_SERVER_GTC
+CFLAGS += -DEAP_SERVER_PSK
+CFLAGS += -DEAP_SERVER_PAX
+CFLAGS += -DEAP_SERVER_SAKE
+CFLAGS += -DEAP_SERVER_GPSK -DEAP_SERVER_GPSK_SHA256
+
 CFLAGS += -DIEEE8021X_EAPOL
 
 ifeq ($(CONFIG_TLS), openssl)