ci: add TSPD support to CPU extensions test group

In the relevant CI group, change the TF config parameter from
"fvp-aarch64-only" to "fvp-tspd-aarch64-only". This enables TSPD
so that context switching can be performed for the v9 tests.

Change-Id: Ic17ef1ecfe33b10c68e6c4e5df8bdb457e215cc1
Signed-off-by: Igor Podgainõi <igor.podgainoi@arm.com>
1 file changed