plat/arm: juno: Implement methods to retrieve soc-id information

Implemented platform functions to retrieve the soc-id information
for juno platform

Change-Id: Ie677120710b45e202a2d63a954459ece8a64b353
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
2 files changed