[PATCH] if_dc cleanups..

[John Baldwin]

I've changed if_dc to use the full 32-bit device ID instead of just the lower 
16-bit device ID in dc_attach() so that it doesn't have to deal with hacks 
like the FAKE device and to make it easier to add new device IDs that have 
collisions in the future.  I've compiled it but have no dc(4) hardware to 
test with, so please test.  Patch is available at:

http://www.FreeBSD.org/~jhb/patches/if_dc.patch

-- 
John Baldwin