MFC: r253654

Set the device description after we call uart_probe(). In uart_probe()
we call device-specific probe functions, which can (and typically will)
set the device description based on low-level device probe information.
In the end we never actually used the device description that we so
carefully maintained in the PCI match table. By setting the device
description after we call uart_probe(), we'll print the more user-
friendly description by default.
MFC: r257808

Add new AMT serial port PCI ID on Intel Lynx Point chipset
MFC: r259838

Add another HP iLO serial (console) port, found on Itanium servers.