drm/i915/dg2: Bump up CDCLK for DG2

We seem to need this W/A same way as for TGL, in order
to fix some of the underruns, which we currently have and
those not related to PSR.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220614123049.16183-2-stanislav.lisovskiy@intel.com