Provide access to device temperature of IP core "io_FanControl"

[mzabeltud]

The IP core io_FanControl currently wraps a device-specific system monitor. This monitor in turn instantiates a device specific XADC which monitors the device temperature. But, the device temperature is also required for other IP cores, e.g., the Xilinx DDR3 memory controller on the KC705 board.

To solve this:

• either an output "device_temp" should be added to the io_FanControl and system monitor IP cores,

• or a separate temperature monitor IP core should be implemented which provides the necessary inputs for io_FanControl and other IP cores like memory controllers.