[PATCH] Remove CPU_FTR_NEED_COHERENT for 7448.

[Jon Loeliger]

So, like, the other day Benjamin Herrenschmidt mumbled:
> 
> I still maintain it should be a runtime thing tho :-)
> 
> Ben.

So, could you comment on my proposed solution doing
things exactly this way?  Speifically, would folks
prefer the dynamic 

    number_of_cpus() == 1 

and possibly checking the device tree or SMP map, or the 

    #ifndef SMP

test guarding the removal of the CPU_FTR_NEED_COHERENT bit?

Thanks,
jdl