Use strcasecmp when comparing kdf_type

Reviewed-by: NPaul Dale <pauli@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14290)

crypto/evp/ctrl_params_translate.c

@@ -893,7 +893,7 @@ static int fix_kdf_type(enum state state,
 
         /* Convert KDF type strings to numbers */
         for (; kdf_type_map->kdf_type_str != NULL; kdf_type_map++)
-            if (strcmp(ctx->p2, kdf_type_map->kdf_type_str) == 0) {
+            if (strcasecmp(ctx->p2, kdf_type_map->kdf_type_str) == 0) {
                 ctx->p1 = kdf_type_map->kdf_type_num;
                 ret = 1;
                 break;