More simple udev blacklisting

[Michal Soltys <soltys@xxxxxxxx>]

With reference to older discussions about blacklisting methods - 
modprobe supports -b (or in long form --use-blacklist) that will also 
block explicit loading by standard module name. Thus you could nicely 
avoid shell wrapper on fb stuff.

The switch won't block implicit dependencies though (so if A requires B, 
B is blacklisted, then modprobe -b A will still load A and B). That 
shouldn't be a problem from udev's perspective though.

Stock udev rules will use -b by default from the next release, peeking 
at the mailing list.

FYI.