fix(ff-a): no NS attribute in hypervisor retrieve request

When validating the return of the hypervisor retrieve request, tftf
was expecting the NS attribute. Which is not meaningful in the context
of the NWd.

Change-Id: Icee86f458b14b67716ceea208f56e68dd85fc047
Signed-off-by: J-Alves <joao.alves@arm.com>
1 file changed