staging: unisys: fix return value for visorbus pci probe

Instead of returning -1, return -ENODEV when there is no probe function
found for the device.

Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed