This commit removes the pseudo tinycrypt package based on symlinks
by adding a new pkg.yml to ext/tinycrypt and using it directly. It
also uses the new mbed-tls bundled ASN1 parser when EC256 is selected.
Signed-off-by: Fabio Utzig <utzig@apache.org>
This bundles the asn1 parser from mbed-tls into mcuboot, which allows
adding EC crypto (tinycrypt based) functionality for target OSes that
don't bundle mbed-tls.
Signed-off-by: Fabio Utzig <utzig@apache.org>