CHROMIUM: ARM: tegra: Add pll_d table entries for 252MHz

CHROMIUM: ARM: tegra: Add pll_d table entries for 252MHz

This rate is required for correct generation of 640x480 HDMI video;
see subsequent patches.

Note: I tested the entry with 12MHz input. The other entries are untested,
but appear logically correct. However, I'm not familiar enough with PLLs
to know if they perhaps exceed the PLL VCO frequency, nor whether the
cpcon values are strictly correct.

Signed-off-by: Stephen Warren <swarren@nvidia.com>;

BUG=
TEST=

[Stephen Warren, 2011-03-04 21:27:08]

This series of patches implements audio-over-HDMI support:

http://codereview.chromium.org/6625021
http://codereview.chromium.org/6623022
http://codereview.chromium.org/6626025
http://codereview.chromium.org/6632011
http://codereview.chromium.org/6624031
http://codereview.chromium.org/6624032
http://codereview.chromium.org/6623023
http://codereview.chromium.org/6625022

The series requires two other series to be merged first:
* My series to backport upstream ASoC into ChromeOS
  (strictly necessary in all likelihood)
* Robert's series to rework the dc driver
  (perhaps not required; some small amount of merging may be required
  in order to merge this first though)

Note: This particular patch has been submitted for upstream, and has been
conceptually approved, but has not yet been merged, pending running the
resulting code against an HDMI compliance test device.

[Olof Johansson, 2011-03-07 03:42:55]

Thanks, applied.

(Turns out the whole series applied without Robert's HDMI changes -- I'm still
reviewing those but this could go in before).