Keep note of ThinkPad model, BIOS and EC firmware information, and log it
on startup.  Makes for far more readable code in places, too.

This patch also adds Lenovo's PCI ID to the pci ids table.
Signed-off-by: NHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: NLen Brown <len.brown@intel.com>