YT921X_ACT_UNK_ACTn
#define YT921X_ACT_UNK_ACTn_FORWARD(port) YT921X_ACT_UNK_ACTn(port, 0) /* flood */
#define YT921X_ACT_UNK_ACTn_TRAP(port) YT921X_ACT_UNK_ACTn(port, 1) /* steer to CPU */
#define YT921X_ACT_UNK_ACTn_DROP(port) YT921X_ACT_UNK_ACTn(port, 2) /* discard */
#define YT921X_ACT_UNK_ACTn_COPY(port) YT921X_ACT_UNK_ACTn(port, 3) /* flood and copy */