[PATCH] Char: sx, fix return in module init

If pci_register_driver fails, but eisa_driver_register doesn't, we don't call
misc_deregister, but returns error.  Return OK in such cases.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>