this is needed for WR-BTrain-VXS release

this is to make sure that WRPC does not get lost. It is better if it simply
restarts. The switchover between SFPs is not meant to be seamless

[VXS support/bin] updated WRPC binary with fixes and support for FRAM in VXS (tmp solution, clean version to be added to WRPC SW)

- fixed one-wire reading of thermometer ID to create MAC
- added reading of FRAM (temporarily instead of FLASH)

This goas along with the support of dual multiplexed channel for GPT
in Virtex5. If we have two multiplexed SFPs, we need to be able to
read the ROM of the currently active.

I prepared it based on SPEC's board support, I forgot to update
vxs package name

Note that on VXS switch, the last device (id 2) has address width 8 bits
(this is needed to be inputed correctly when asked by chipscope)

added ISE project file (*xise) because synthesis of VXS require
special configuration, otherwise ISE returns internal error.
This special configuration is added XST command line option:
" -use_new_parser yes". It can be added by clicking the top
hierarhy file (vxs_wr_ref_top.vhd) in the "Design Manager", the
right-click on "Synthesis -XST" in "Processes" window, from
drop menu chose "Process Properties - Synthesis Options" and
then input " -use_new_parser yes" on "Other XST Command Line
Options"

This reverts commit b3389d12.

This reverts commit 9810ef9a.

platform/xilinx: fix bug where reference clock was not propagated with g_USE_DEFAULT_PLLS was set to false

no frames are transmitted/received, it only checked correctness of
transmission

added timeout to throw an error when no frames is received for an
unacceptable time