plat/tc0: Change to 8 cores for Theodul

This includes changing to 8 cores for header file, dts
and topology. The missing uart node is also added to
cactus.dts.

Signed-off-by: Usama Arif <usama.arif@arm.com>
Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: I1c70f9fd92273d7b5dc97875707e469d7f39c12d
7 files changed