Fix warning in gf_serialize
Fix warning in gf_serialize

Compiling under -Werror fails in gf_serialize:

crypto/ec/curve448/f_generic.c:21:27: error: argument 1 of type 'uint8_t[56]' {aka 'unsigned char[56]'} with mismatched bound [-Werror=array-parameter=]
   21 | void gf_serialize(uint8_t serial[SER_BYTES], const gf x, int with_hibit)
      |                   ~~~~~~~~^~~~~~~~~~~~~~~~~
In file included from crypto/ec/curve448/f_generic.c:12:
crypto/ec/curve448/field.h:65:28: note: previously declared as 'uint8_t *' {aka 'unsigned char *'}
void gf_serialize(uint8_t *serial, const gf x, int with_highbit);
                  ~~~~~~~~~^~~~~~
Changed parameter to pointer to fix this warning.

Signed-off-by: Juergen Christ <jchrist@linux.ibm.com>

Reviewed-by: Paul Dale <ddec78389666b4f7c9b4d110380c848489a3e4aa@openssl.org>
Reviewed-by: Tomas Mraz <2bc6038c3dfca09b2da23c8b6da8ba884dc2dcc2@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15376)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl