HEADSUP: vt now default terminal driver on PowerPC

[Nathan Whitehorn]

I fixed the last remaining bugs in vt today and have repointed the PPC 
GENERIC and GENERIC64 kernel configurations on HEAD to use it instead of 
syscons. The largest visible changes should be a new font and support 
for UTF-8 at the system console. If you run into any difficulties, 
please report them to the list.
-Nathan