tools: ynl: use ident name for Family, too.

This allow consistent naming convention between Family and others
element's name.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/9bbcab3094970b371bd47aa18481ae6ca5a93687.1719930479.git.pabeni@redhat.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>