3rdparty: Adjust use of Everest in ecp_supported_curves
diff --git a/library/ecp.c b/library/ecp.c
index 8ee517e..c281d84 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -410,12 +410,9 @@
 #if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
     { MBEDTLS_ECP_DP_SECP192K1,    18,     192,    "secp192k1"         },
 #endif
-#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
+#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED) && defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
     { MBEDTLS_ECP_DP_CURVE25519,   29,     256,    "x25519"            },
 #endif
-#if defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
-    { MBEDTLS_ECP_DP_CURVE448,     30,     448,    "x448"              },
-#endif
     { MBEDTLS_ECP_DP_NONE,          0,     0,      NULL                },
 };