staging: comedi: skel: cleanup pci_driver declaration

For aesthetic reasons, add some whitespace to the pci_driver
declaration.

Also, move the pci device table near the pci_driver.

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>