staging: meilhaus, annotate cpi functions

Add __devinit and __devexit to pci probe/remove. Also make pci_driver
static.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: David Kiliani <mail@davidkiliani.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>