drm/i915/dg2: Add DG2 to the PSR2 defeature list

PSR2 is not supported on DG2.

Cc: Caz Yokoyama <Caz.Yokoyama@intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714031540.3539704-49-matthew.d.roper@intel.com

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

@@ -870,7 +870,8 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
 	}
 
 	/* Wa_16011181250 */
-	if (IS_ROCKETLAKE(dev_priv) || IS_ALDERLAKE_S(dev_priv)) {
+	if (IS_ROCKETLAKE(dev_priv) || IS_ALDERLAKE_S(dev_priv) ||
+	    IS_DG2(dev_priv)) {
 		drm_dbg_kms(&dev_priv->drm, "PSR2 is defeatured for this platform\n");
 		return false;
 	}