tc: use common tc code for tftf

TFTF was refactored to share common code between tc platforms.
Therefore instead of using tc0 as the platform it is now tc.
This patch modifies the tc configs to reflect this.

Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
Change-Id: If35e138018b5bcc168430f195c9b0eab6cf561ad
3 files changed