staging: comedi: me_daq: remove pci_dev_put() in detach

This driver uses the comedi auto config mechanism and does not
walk the pci bus to find the pci_dev. It should not be calling
pci_dev_put() to decrement the ref count.

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>