gpdevboard: Don't try to detach kernel driver on Windows or macOS
gpdevboard: Don't try to detach kernel driver on Windows or macOS

This doesn't work on those platforms. On Windows, it is unnecessary as
libusb can go through the Windows HID layer. On macOS, you need the
codeless kext in contrib/.

rqou/openfpga,rqou/openfpga,azonenberg/openfpga,azonenberg/openfpga,azonenberg/openfpga,azonenberg/openfpga,rqou/openfpga,rqou/openfpga,azonenberg/openfpga,rqou/openfpga