iwlwifi: show command string for REPLY_D3_CONFIG

missing the string, add it
Signed-off-by: NWey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-agn-rx.c

@@ -117,6 +117,7 @@ const char *get_cmd_string(u8 cmd)
 		IWL_CMD(REPLY_WOWLAN_TKIP_PARAMS);
 		IWL_CMD(REPLY_WOWLAN_KEK_KCK_MATERIAL);
 		IWL_CMD(REPLY_WOWLAN_GET_STATUS);
+		IWL_CMD(REPLY_D3_CONFIG);
 	default:
 		return "UNKNOWN";