[aes/cover] added cover sample to scoreboad
[aes/cover] added cover sample to scoreboad

Signed-off-by: Rasmus Madsen <11e53b74c72d2fddbacc59264817a2c86b087c70@wdc.com>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan