core: pta: APDU pseudo trusted application

Allow trusted applications and REE clients to send APDU frames to a
secure element.

Even though secure elements are usually accessible from serial buses,

core: pta: APDU pseudo trusted application

Allow trusted applications and REE clients to send APDU frames to a
secure element.

Even though secure elements are usually accessible from serial buses,
when they have been initialized in OP-TEE is possible that the SCP03
secret keys are only available in the Trusted World and therefore APDU
requests must be handled in OP-TEE.

Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Acked-by: Jerome Forissier <jerome@forissier.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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