GTA04: gyroscope and compass drivers added/made working

[Dr. H. Nikolaus Schaller]

Hi,
I have added (or made working) the ITG3200 and HMC5883L drivers
in the 2.6.32-Kernel.

The ITG3200 was basically working, but the description was wrong.

For the HMC5883L there is still some bug where the X channel shows
-4096 unless the device is oriented almost upright.

Now we have all sensors working: Accelerometer, Barometer, Gyroscope,
Compass, Touch screen. And some of them even have a built-in thermometer.

Just the Camera driver needs more work.

Documentation:

	http://projects.goldelico.com/p/gta04-kernel/page/Sensors/

Kernel/Modules:

	http://download.goldelico.com/gta04/20120123-GTA04-HW-Tester/

Sources:

	https://github.com/goldelico/gta04-kernel/commits/hw-validation

Nikolaus