release/rdn2: update the rdn2 manifest file for 2021.01.25 release

Update the RD-N2 platform manifest file for the RD-INFRA-2021.01.25
platform software release.

Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
Change-Id: Ic6945321f8675e07dd77f6da054c976c8ee0dc5d