t4_i2c_rd
int t4_i2c_rd(struct adapter *adap, unsigned int mbox,
rc = -t4_i2c_rd(sc, sc->mbox, i2cd->port_id, i2cd->dev_addr,
rc = -t4_i2c_rd(sc, sc->mbox, pi->port_id, i2c.dev_addr,