product/rdn2: enable CCLA to CCLA direct connect mode for variant 2

RD-N2 Multichip platform variant uses CCLA to CCLA direct connect mode
which connects the upper link layer (ULL) of CCLA of one chip to another
chip's CCLA's ULL. Hence enable this mode for all the CCG nodes in the
config data.

Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
Change-Id: I593e78778ea599d8a9043c72d82e2f8e2082c93d