[RFC/Patch] ppc4xx_pm.c

[akuster]

I am in the process of fixing the init of the pm for 4xx in ppc4xx_pm.c
so that it can be used and I and others have discussed having the
drivers enable/disable their own power managment bits at init & exit times.

So what I would like to do is have each core header define a default set
of what is required to be powered on and then have each driver enable
them selves.  These changes would be done in two stages

1) fix ppc4xx_pm.c init and have the default pm bitmap set to all ocp
drivers on.

2) update ocp drivers to enable/disable their pm settings and remove
their enable bits from the default bitmap in the core headers.

armin


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