MSS_RXQ_ASS_REG
val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq));
mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val);
val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq));
mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val);