List TrackPoint device before generic model.
Allow simplebus to attach in less strict way, when "simple-bus" listed on not
first position of compatible property, so simplebus driver can be generic
driver for any bus listed as compatible with "simple-bus".

Sponsored by:	The FreeBSD Foundation
Hide "no default resources for" warning under bootverbose. It's ok to use
optional resources.

Sponsored by:	The FreeBSD Foundation
Allow simplebus to attach to another simplebus.

Sponsored by:	The FreeBSD Foundation
Add bhyve to examples.

Requested by: alfred, julian
Obtained from:	NetApp
Don't hesitate to ask parent to setup IRQ finally.

Sponsored by:	The FreeBSD Foundation