staging: comedi: amplc_pci230: Replace printk calls

Replace the printk calls with dev_info, dev_err, etc.

A load of DPRINTK() macro calls which may result in printk() calls
have been left alone to be tackled en masse at a later date.

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