8260 CPM DP ram free function

[Rune Torgersen]

Hi

I hope someone on this list can push the following patch to one of the
ppc trees.

It adds functionality to the 8260 CPM to free() allocated host and dp
ram memory. (nice for loadable drivers that use DP ram)

The functions that are added are m8260_cpm_dpfree() and
m8260_cpm_hostfree()

This patch is agains 2.6.5, but it should apply cleanly agains any 2.4.x
and 2.6.x, since it only touches arch/ppc/8260_io/commproc.c and
include/asm-ppc/cpm_8260.h

This could possibly also be used on the 8xx CPUs, since the code is
identical.
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