staging: comedi: dt3000: move the setup_pci() code into the attach

The setup_pci() function simply calls comedi_pci_enable() to enable
the device then ioremaps the pci address. Move the code directly
into the attach function as is more typical for the comedi pci
drivers.

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>