SHIFT10
#define PHY_M_EC_M_DSC(x) (SHIFT10(x) & PHY_M_EC_M_DSC_MSK)
#define PHY_M_LED_MO_DUP(x) SHIFT10(x) /* Bit 11..10: Duplex */
#define TX_COL_THR(x) (SHIFT10(x) & GM_TXCR_COL_THR_MSK)