drm/i915/psr: Use crtc_state->port_clock instead of intel_dp->link_rate

Intel_dp->link_rate is not yet set at this point. Instead use
crtc_state->port_clock.

Fixes: 0dd21f83 ("drm/i915/psr: Silence period and lfps half cycle")
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409085759.178235-1-jouni.hogander@intel.com

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

@@ -1276,7 +1276,7 @@ static int _lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp,
 	aux_less_wake_lines = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode,
 						       aux_less_wake_time);
 
-	if (!_lnl_get_silence_period_and_lfps_half_cycle(intel_dp->link_rate,
+	if (!_lnl_get_silence_period_and_lfps_half_cycle(crtc_state->port_clock,
 							 &silence_period,
 							 &lfps_half_cycle))
 		return false;