wifi: iwlwifi: remove WARN from read_mem32()

There's no reason to warn here, it's not an internal consistency
issue, we even use this to check if the device is dead, and if it
read_mem() returns an error that's either because grab NIC access
or memory allocation failed, both of which are already noisy.

Just remove the warning entirely.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230816104355.5f4e80eb63cc.Iffd88f63f95575f28e503da13b473724e3341aee@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-trans.h

 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 /*
- * Copyright (C) 2005-2014, 2018-2022 Intel Corporation
+ * Copyright (C) 2005-2014, 2018-2023 Intel Corporation
  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
  * Copyright (C) 2016-2017 Intel Deutschland GmbH
  */
@@ -1490,7 +1490,7 @@ static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
 {
 	u32 value;
 
-	if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
+	if (iwl_trans_read_mem(trans, addr, &value, 1))
 		return 0xa5a5a5a5;
 
 	return value;