BGX_GMP_PCS_MISC_CTL
misc_ctl = PORT_RD_8(sc, BGX_GMP_PCS_MISC_CTL);
PORT_WR_8(sc, BGX_GMP_PCS_MISC_CTL, misc_ctl);
val = PORT_RD_8(sc, BGX_GMP_PCS_MISC_CTL);
PORT_WR_8(sc, BGX_GMP_PCS_MISC_CTL, val);
misc_ctl = PORT_RD_8(sc, BGX_GMP_PCS_MISC_CTL);
PORT_WR_8(sc, BGX_GMP_PCS_MISC_CTL, misc_ctl);
(void)PORT_RD_8(sc, BGX_GMP_PCS_MISC_CTL);