drm/i915: Reuse ibx_dump_hw_state() for gmch platforms

GMCH platform DPLLs are similar to the IBX+ PCH DPLLs so
we can just use the same state dump function for both.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240209183809.16887-4-ville.syrjala@linux.intel.com


Reviewed-by: Mika Kahola <mika.kahola@intel.com>