MFC 197600.

MFC 197600.
  For AR8132 fast ethernet controller, do not report 1000baseT
  capability to mii(4). Even though AR8132 uses the same model/
  revision number of F1 gigabit PHY, the PHY has no ability to
  establish 1000baseT link. I have no idea why Atheros use the same
  device/model id for this PHY.
  With this change atphy(4) does not report 1000baseT media
  capability and manual 1000baseT configuration is also disabled
  which is more desirable behavior for 10/100Mbps PHY.

git-svn-id: svn://svn.freebsd.org/base/stable/8@199924 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f