drm/i915/pps: Don't apply quirks/etc. to the VBT PPS delays if they haven't been initialized

Skip QUIRK_INCREASE_T12_DELAY and the t11_t12 adjustment of the
VBT PPS delays if we've not yet initialized them. Will be important
later when the PPS delay init can happen before VBT parsing.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220510104242.6099-6-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_pps.c

@@ -1184,6 +1184,9 @@ static void pps_init_delays_vbt(struct intel_dp *intel_dp,
 
 	*vbt = dev_priv->vbt.edp.pps;
 
+	if (!pps_delays_valid(vbt))
+		return;
+
 	/* On Toshiba Satellite P50-C-18C system the VBT T12 delay
 	 * of 500ms appears to be too short. Ocassionally the panel
 	 * just fails to power back on. Increasing the delay to 800ms