A set of ports that are identified by a PortList, in which
each port is represented as a bit.
Clears the Rx information about the remote agents accordingly to the
specified PortList.
The default value for rlLldpClearRx object is an empty binary string,
which means no ports are specified to be cleared from the Rx Info.
This object behaviors as an event (write-only) than
reading this object always results in an Empty Port List of length zero.