Appease unifdef

I was going to describe those changes as temporary, to be undone after
applying unifdef, but it turns out they're both in dead code, so there
will be nothing to undo after unifdef has run.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/library/ssl_tls12_client.c b/library/ssl_tls12_client.c
index 63f4240..9241b4a 100644
--- a/library/ssl_tls12_client.c
+++ b/library/ssl_tls12_client.c
@@ -1810,11 +1810,7 @@
     return 0;
 }
 
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED   ||
-          MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED    ||
-          MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED   ||
-          MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
-          MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDH*_ENABLED */
 
 #if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) ||     \
     defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) ||     \
@@ -1853,9 +1849,7 @@
 
     return ret;
 }
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED || \
-          MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED || \
-          MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_*_ENABLED */
 #endif /* !MBEDTLS_USE_PSA_CRYPTO */
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
 MBEDTLS_CHECK_RETURN_CRITICAL