config: Add example power model to the bL config

Showcasing the use of Vecor2d stats, and some vector-length dependent
power values.  NOTE: these values are purely for illustration and have
nothing to do with actual CPU designs

Change-Id: Id7817a6c288a20031f2ae218b6233d086f61229a
Signed-off-by: Stephan Diestelhorst <stephan.diestelhorst@arm.com>
1 file changed