plat/arm/rdn2: update TZC base address

Update TZC base address to align with the recent changes in the platform
memory map.

Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
Change-Id: I0d0ad528a2e236607c744979e1ddc5c6d426687a
1 file changed