lib/crypto: Adapt public_key header with MbedTLS

Previous patch has introduced MbedTLS porting layer for public key,
here to adjust the header and makefiles accordingly.

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
3 files changed