coresight: check cpu node for cpu ctis independent of cti save

Validate cpu node for cpu CTIs independent of cti save being set
for the respective cpu CTI. This allows for failing the probe if
the cpu node for cpu CTI does not match with one of the cpus in
the cpu possible mask irrespective of whether the target requires
cpu CTI save and restore across power collapse.

Change-Id: I1ebabedf9b14c15f376e06389c22cb71caf851af
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>