udev usb vid pid fixes

Clean up linux udev rules.
Cosmetic change to where we map sparky's pid onto freedom's pid.

Linux users can apply the new udev rules like this (make sure you delete any old versions of these rules from /etc/udev/rules.d/ first):
````
sudo cp package/linux/deb_common/taulabs.udev /etc/udev/rules.d/45-taulabs-permissions.rules
sudo udevadm control --reload-rules
````

No functional changes to firmware.