bktr update

[Joerg Sonnenberger <joerg@xxxxxxxxxxxxxxxxx>]

Hi all,
the patch at ftp://dragonflybsd.dyndns.org/patches/testing/bktr.diff
imports FreeBSD's current driver which has some style changes and a
new msp driver. I'm going to add wrapper headers for the compatibility
locatins of ioctl_meteor.h and ioctl_bktr.h later, but I want some
feedback on this and go on with cleaning the driver. Esp. the DMA
memory handling is messy at best.

Patrick, your patch is included.

Joerg