ci(tc0): switch to SCP 2.8.0 release binaries

This patch changes usage of TC0 SCP binaries
from 2.8.0-dev to 2.8.0 release.

Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Change-Id: Ied9b3f2365330ae1e1ba01f6119b774d94bb70d0
1 file changed