staging: comedi: adl_pci9118: replace printks

Replace or remove the `printk()` calls in this driver.  Call new function
`pci9118_report_attach()` to report successful attachment of the board.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>