Access configuration for DKEK.
| subhdr | Magic and size for integrity check | 
| allowed_hosts | ID's of hosts allowed to use DKEK. Use TISCI_HOST_ID_ALL if any host is allowed | 
| allow_dkek_export_tisci | If DKEK can be exported via TISCI interface to hosts. Set to 0x5A to allow. | 
| rsvd | Reserved field for future use. Set to 0. | 
Data Fields | |
| struct tisci_boardcfg_substructure_header | subhdr | 
| uint8_t | allowed_hosts [MAX_NUM_DKEK_ALLOWED_HOSTS] | 
| uint8_t | allow_dkek_export_tisci | 
| uint8_t | rsvd [3] | 
| struct tisci_boardcfg_substructure_header tisci_boardcfg_dkek::subhdr | 
| uint8_t tisci_boardcfg_dkek::allowed_hosts[MAX_NUM_DKEK_ALLOWED_HOSTS] | 
| uint8_t tisci_boardcfg_dkek::allow_dkek_export_tisci | 
| uint8_t tisci_boardcfg_dkek::rsvd[3] |