validate: fix bug with embedded structs
validate: fix bug with embedded structs

Treat members of embedded structs as you own when validating.

ajeddeloh/ignition,higebu/ignition,ajeddeloh/ignition,higebu/ignition,AlexNPavel/ignition,ajeddeloh/ignition,coreos/ignition,AlexNPavel/ignition,dgonyeo/ignition,dgonyeo/ignition,coreos/ignition,dgonyeo/ignition,AlexNPavel/ignition,higebu/ignition,coreos/ignition