lanana: Add major/minor entries for PPC QE UART devices

[Mathiasen, Torben]

> We are making a very complicated problem
> out of nothing.  This hasn't caused any problems
> in the past, and changing the existing names and
> minors will cause problems for everyone today.
> 
> Just leave it alone, fix up the documentation,
> and have the driver print some warning if it
> allocates more than 4 UARTs.
> 

Dan has a point here. Now I clearly can't comment on how bad 8 is
needed, but since this has been like this for a while, I'll have to
assume 4 is covering most cases.

Moving things to a different range _will_ be much worse for distro
maintainers than driver developers. And I bet the latter is going to be
minor work as things has been like this for a while.

But we can still allocate 4 more at a different minor that distro's can
_choose_ to use. Consider it an enhancement to the 4 we have had in the
past.

Torben