staging: comedi: me4000: absorb get_registers() into its caller

The get_registers() function reads the pci base addresses used
in the driver. It's simple enough, just move the code into the
function that calls it.

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>