[PATCH] Remove CPU_FTR_NEED_COHERENT for 7448.

[Paul Mackerras]

Jon Loeliger writes:

> From: James.Yang <James.Yang at freescale.com>
> 
> Remove CPU_FTR_NEED_COHERENT for MPC7448 (and single-core MPC86xx).
> This prevents needlessly setting M=1 when not SMP.

Do you have any benchmark results showing a real performance
improvement from these?

Paul.