Add support for antenna delay calibration

[hannobraun]

Since timing is very important for the range measurement, the TX/RX delay cause by the antenna and any components between it and the DW1000, need to be taken into account.

There's a section about antenna delay calibration in the DW1000 user manual, and I think I've seen application notes about it. I think it would be good to somehow implement the calibration procedure, to help users figure out their antenna delay values.

This does not affect use of the DWM1001, as there are known antenna delay values that can be used for that (see ranging examples in the dwm1001 crate).