crypto: qat - simplify adf_service_mask_to_string helper

Use a single scnprintf() for each set bit and drop the offset in the
else branch to simplify adf_service_mask_to_string().

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/intel/qat/qat_common/adf_cfg_services.c

@@ -94,10 +94,9 @@ static int adf_service_mask_to_string(unsigned long mask, char *buf, size_t len)
 	for_each_set_bit(bit, &mask, SVC_COUNT) {
 		if (offset)
 			offset += scnprintf(buf + offset, len - offset,
-					    ADF_SERVICES_DELIMITER);
-
-		offset += scnprintf(buf + offset, len - offset, "%s",
-				    adf_cfg_services[bit]);
+				ADF_SERVICES_DELIMITER "%s", adf_cfg_services[bit]);
+		else
+			offset += scnprintf(buf, len, "%s", adf_cfg_services[bit]);
 	}
 
 	return 0;