ENET_RCR_RMII_10T
rcr &= ~ENET_RCR_RMII_10T;
rcr &= ~ENET_RCR_RMII_10T; /* 100Mbps mode */
rcr |= ENET_RCR_RMII_10T; /* 10Mbps mode */
rcr_speed = ENET_RCR_RMII_10T;