python/crypto/tpm_ea_policy: compute SHA384 and SHA512 policies
python/crypto/tpm_ea_policy: compute SHA384 and SHA512 policies

This enables computing the SHA384 policy used by swtpm_setup to protect
an ECC NIST P384 EK, which is the standard policy for:

    PolicySecret_SHA384(RH_ENDORSEMENT) OR PolicyAuthorizeNV_SHA384(0x01c07f02)

https://github.com/stefanberger/swtpm/blob/83f4e9604551966d4132a5caa281625ca0a4f3af/src/swtpm_setup/swtpm_setup.sh.in#L1282-L1286

fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared