tag: Implement readout of tag UID via DBus interface

This adds a 'Uid' property to the DBus interface for tags, which
returns the UID of the tag as byte array.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20210311085020.429987-1-frieder.schrempf@kontron.de
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
1 file changed