iwlwifi: bump FW API to 72 for AX devices

Start supporting API version 72 for AX devices.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220304131517.8de72a8ea67f.I66681363afeb34c619379a5989090264fe6b5f2a@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/cfg/22000.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
  * Copyright (C) 2015-2017 Intel Deutschland GmbH
- * Copyright (C) 2018-2021 Intel Corporation
+ * Copyright (C) 2018-2022 Intel Corporation
  */
 #include <linux/module.h>
 #include <linux/stringify.h>
@@ -10,7 +10,7 @@
 #include "fw/api/txq.h"
 
 /* Highest firmware API version supported */
-#define IWL_22000_UCODE_API_MAX	71
+#define IWL_22000_UCODE_API_MAX	72
 
 /* Lowest firmware API version supported */
 #define IWL_22000_UCODE_API_MIN	39