Remove key owner encoding from crypto client

The key owner encoding feature of MbedTLS is only used in the crypto
backend, remove it from the crypto client headers to avoid confusion.

Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: I5fad4d12964b61571b1ad7895f4f12aeb7fa201f
1 file changed