Serial FIPS: Don't include MLD_FIPS202X4_HEADER_FILE

If MLD_CONFIG_SERIAL_FIPS202_ONLY is set, we don't make use of any fips202x4
functions.
This commit makes the include conditional, such that consumers setting
MLD_CONFIG_SERIAL_FIPS202_ONLY don't have to provide an (empty) fips202x4.h.

Signed-off-by: Matthias J. Kannwischer <[email protected]>

Author: mkannwischer

mldsa/symmetric.h

@@ -10,7 +10,9 @@
 #include "common.h"
 
 #include MLD_FIPS202_HEADER_FILE
+#if !defined(MLD_CONFIG_SERIAL_FIPS202_ONLY)
 #include MLD_FIPS202X4_HEADER_FILE
+#endif
 
 #define STREAM128_BLOCKBYTES SHAKE128_RATE
 #define STREAM256_BLOCKBYTES SHAKE256_RATE