drm/i915/tgl: Add second TGL PCH ID

Another TGP ID has shown up, so let's add it to avoid South Display
breakage on systems that have this ID.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: James Ausmus <james.ausmus@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191106005526.1500-1-james.ausmus@intel.com

drivers/gpu/drm/i915/intel_pch.c

@@ -85,6 +85,7 @@ intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
 		WARN_ON(!IS_ELKHARTLAKE(dev_priv));
 		return PCH_MCC;
 	case INTEL_PCH_TGP_DEVICE_ID_TYPE:
+	case INTEL_PCH_TGP2_DEVICE_ID_TYPE:
 		DRM_DEBUG_KMS("Found Tiger Lake LP PCH\n");
 		WARN_ON(!IS_TIGERLAKE(dev_priv));
 		return PCH_TGP;