signature: avoid overwriting X509 verify parameters
signature: avoid overwriting X509 verify parameters

This is in preparation to add additional verify parameters in check_bundle
already to avoid the pain of passing it down over multiple layers later.

OpenSSL's X509_STORE_new() already creates a default param struct internally
via X509_VERIFY_PARAM_new().

Signed-off-by: Michael Heimpold <59934addbc17c0fa64a0bf4bb38537fc23439974@heimpold.de>
Signed-off-by: Jan Luebbe <3a82f1ac4ad59607a20f180f1c67ac8ba31ad0d5@pengutronix.de>

rauc/rauc,ejoerns/rauc,rauc/rauc,jluebbe/rauc,ejoerns/rauc,jluebbe/rauc,rauc/rauc,jluebbe/rauc,ejoerns/rauc