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TEE trusted keys support depends on registered shared memory support since the key buffers are needed to be registered with OP-TEE. So make that dependency explicit to not register trusted keys support if underlying implementation doesn't support registered shared memory. Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Tested-by: Jerome Forissier <jerome.forissier@linaro.org> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>