staging: comedi: adl_pci9111: remove pci_dev_put()

This driver no longer walks the pci bus to find the pci_dev.
The pci_dev_put() is no longer needed.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>