Merge git://git.kernel.org/pub/scm/linux/kernel/git/kkeil/ISDN-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/kkeil/ISDN-2.6:
  Add layer1 over IP support
  Add mISDN HFC multiport driver
  Add mISDN HFC PCI driver
  Add mISDN DSP
  Add mISDN core files
  Define AF_ISDN and PF_ISDN
  Add mISDN driver