[LinuxBIOS] [PATCH] v3 drop malloc, clean up device model

[Stefan Reinauer]

* start using arch/foo.h again instead of archfoo.h (trivial)
* make constructor an initializer.
* fix memory leak/code flow error in current code
* add spinlocking
* drop malloc and use new_device for device allocation instead.
* ad CONFIG_SMP as it is needed by spinlocks and soon other stuff.

tested in qemu and works.

Signed-off-by: Stefan Reinauer