The tool wrs_port_tx_control is not needed anymore, its functionality (putting
the link down) is available by performing:
ifconfig <port> down
Such functionality was added in the commit:
[Feature: 1336] kernel/wr_nic: disable SFP when interface is down

Revert the following commits:
2b6c0bc2 userspace/tools: wrs_port_tx_control, rename network interfaces from wrX to wriX+1
ceb0c512 userspace/tools/wrs_port_tx_control: Include some defines
97d8878d userspace/tools/wrs_port_tx_control: initialise register address
35a63cd9 kernel/wb-regs: Added address offsets to endpoint-mdio.h
d11514e5 userspace/tools/wrs_port_tx_control: added unistd.h
3184c2a7 doc/wrs-user-manual: added description of wrs_port_tx_control
4da29df3 userspace/tools: dynamically check maximum port number in wr_port_tx_control
4244c894 userspace/tools: added a program to control the TX on a WRS port
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>