PRUSS_MII_RT_TXCFG0
txcfg_reg = (mii == ICSS_MII0) ? PRUSS_MII_RT_TXCFG0 :
txcfg_reg = (slice == ICSS_MII0) ? PRUSS_MII_RT_TXCFG0 :
txcfg_reg = PRUSS_MII_RT_TXCFG0;
txcfg = PRUSS_MII_RT_TXCFG0;