Fold the contents of sonypi.h into sonypi.c making some structures static.

Partly-from: Adrian Bunk <bunk@stusta.de>
Suggested-by: Dmitry Torokhov <dtor_core@ameritech.net>
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>