staging: comedi: daqboard2000: use the pci_resource_len()

Use pci_resource_len() when doing the ioremap instead of assuming
the resource size.

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>

diff --cc drivers/staging/comedi/drivers/daqboard2000.c
Simple merge