ppc: Express dependencies of the embedded machines with kconfig

This makes it much easier if the users want to disable some of
the embedded machines for their builds.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 files changed