gma500_gfx: spread spectrum clocking?

[Ilia Mirkin]

On Tue, Apr 7, 2015 at 3:29 PM, George McCollister
<george.mccollister at gmail.com> wrote:
> Looks like these are the magic bits that need to be set:
>
> dpll |= (7<<9) | (1<<13) | (1<<14);
>
> Anyone happen to have proper descriptions for these bits so I could
> add them to psb_intel_reg.h or thoughts on how/where an option could
> be exposed to enable these?

FWIW in nouveau, we tend to call things like that UNK09, UNK0D, UNK0E.
Or just throw the constant in directly to make it easier to compare to
traces.

  -ilia