staging: comedi: adl_pci9111: remove PCI9111_DRIVER_NAME define

This define is only used in a comedi_error() message. The addition of
the driver name to the message is not necessary. Remove the define.

For aesthetics, convert the comedi_error() into a dev_dbg().

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>