Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Start each of the license/copyright comments with /*-, minor shuffle of lines

Include <sys/bus.h>, which is needed after Doug's latest object changes.

Checkpoint of today's changes. We now get to the point where the pccard
layer is trying to access the now unexistant chip functions.
o Added DEVPRINTF which is like DPRINTF only calls device_printf.
o Made it possible to define PCICDEBUG
o Remove ph_parent and use the softc pointer sc instead in pcic_handle.
o Remove all references to dv_xname
o Add some debug messages.
o enable MI attach/detach calling for pccard.
o convert pcic_chip_socket_{en,dis}able to pcic_{dis,en}able_socket
and connect them to the power_{enable,disbale}_socket.
o Remove pccard pointer from pcic_softc.
o GC some unused pccard functions.
o Convert pccard_chip_socket* to POWER_ENABLE_SOCKET
o kill pccard_attach_args.
o power_if.m updates. More to come.

Add resource activation routines to pcic driver. Minor cleanup of
socket attach code. We now have at least a chance for pccard devices
appearing in the future.

This is a snapshot of ongoing work. Proceed at your own risk.