[coreboot] [PATCH] Enable Ultrabay and IDE interface if Ultrabay device is present

[Sven Schnelle]

this small patch series enable the Ultrabay found in T60 and X60 Laptops.
The X60 is a bit more ugly as the T60 because the X60 ultrabase notifies
the system over some GPIO Lines about Ultrabay state, while the T60 uses
PMH7 and the EC for status information.

I'm not sure if everyone likes modifying chip_info in the dev tree, so if
anyone has a better solution please give me a hint.

Happy corebooting with Ultrabay devices,

Sven.