const golang.org/x/sys/unix.ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L3499: 	ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT                            = 0x37