IXGBE_KRM_PMD_FLX_MASK_ST20_SPEED_MASK
reg_val &= ~IXGBE_KRM_PMD_FLX_MASK_ST20_SPEED_MASK;
flx_val &= ~IXGBE_KRM_PMD_FLX_MASK_ST20_SPEED_MASK;
flx_val &= ~IXGBE_KRM_PMD_FLX_MASK_ST20_SPEED_MASK;
reg_val &= ~IXGBE_KRM_PMD_FLX_MASK_ST20_SPEED_MASK;