drm/i915/vrr: Add function to reset DC balance accumulated params

drm/i915/vrr: Add function to reset DC balance accumulated params

Add function which resets all accumulated DC Balance parameters
whenever adaptive mode of VRR goes off. This helps to give a
fresh start when VRR is re-enabled.

--v2:
- Typo, change crtc_state to old_crtc_state. (Ankit)

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20251223104542.2688548-10-mitulkumar.ajitkumar.golani@intel.com