drm/i915/psr: HSW/BDW have no PSR2

Deal with HSW/BDW in transcoder_has_psr2().
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230609141404.12729-7-ville.syrjala@linux.intel.comReviewed-by: Jouni Högander <jouni.hogander@intel.com>

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

@@ -797,8 +797,10 @@ transcoder_has_psr2(struct drm_i915_private *dev_priv, enum transcoder cpu_trans
 		return cpu_transcoder == TRANSCODER_A || cpu_transcoder == TRANSCODER_B;
 	else if (DISPLAY_VER(dev_priv) >= 12)
 		return cpu_transcoder == TRANSCODER_A;
-	else
+	else if (DISPLAY_VER(dev_priv) >= 9)
 		return cpu_transcoder == TRANSCODER_EDP;
+	else
+		return false;
 }
 
 static u32 intel_get_frame_time_us(const struct intel_crtc_state *cstate)