tpm2tools: Fix NVReadEx bug
tpm2tools: Fix NVReadEx bug

We should always read from NVData with the owner authorization.

This is what we do for "gotpm read nvdata", and we should be
consistient. This bug was causing issues when reading endorsement keys
with nvdata templates.

Signed-off-by: Joe Richey <24d3dd8348b5cac19a417e52b4f8141ba91506f0@google.com>

google/go-tpm-tools,google/go-tpm-tools,google/go-tpm-tools