FR_AB_XX_CORE_STAT
ef4_reado(efx, ®, FR_AB_XX_CORE_STAT);
ef4_writeo(efx, ®, FR_AB_XX_CORE_STAT);
ef4_reado(efx, ®, FR_AB_XX_CORE_STAT);
ef4_reado(efx, ®, FR_AB_XX_CORE_STAT);
ef4_writeo(efx, ®, FR_AB_XX_CORE_STAT);