Move all the power management (SMBus) drivers to their own directory,
away from sys/pci.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272017 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Remove the empty sys/pci directory.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272018 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Remove "pci" from CSCOPEDIRS.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272019 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f