libs/utils/energy: add support for remote IIO energy probing

Using the https://github.com/BayLibre/iio-capture

 utility to capture energy
using the iio infrastructure.

Suggested-by: Neil Armstrong (Renesas) <narmstrong+renesas@baylibre.com>
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>