juno/pvt: Use correct calibration for SoC temp

Created by: nicola-mazzucato-arm

With this change the calibration values are correctly set based on the board version.

Change-Id: Iaf1aff54183be0110713d66f06ee23cfa8f7eb12 Signed-off-by: Nicola Mazzucato nicola.mazzucato@arm.com