test(ff-a): bump FF-A version to v1.3

Following Hafnium FF-A version bump, increase the
expected version in the tests to FF-A v1.3.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I82ce437834d3d711059b0a74b15bcf4757c547a5
1 file changed