patch for kernel 2.6.20-hh2

I succeeded building latest kernel from handhelds.org.
I found out, that suitable audio driver is already there. BT and WiFi
drivers are there for a long time, and must be working with loox.

Here is the patch, apply it on clean code from cvs.
I didn't modify loox720_defconfig, so it doesn't contain all needed values.
Use my config as starting point.

Some structures in lcd drivers changed, there might be a bug in backlight
initialization call. Also, MACHINE_CONFIG declaration may cause problems.