fix(fvp): extract core id from mpidr for pwrc operations

The ID field populated for every FVP PWRC register interface must be
computed from the affinity level values from MPIDR.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: If1474fd25704911f8f717dafb419a0734b99a4ec
1 file changed