wifi: iwlwifi: fw: pnvm: fix uefi reduced TX power loading

There are a number of issues here:
 * if trans->reduce_power_loaded is already true, we call
   iwl_trans_set_reduce_power() with an uninitialized len
   value
 * in this case we also clobber a previous load/setting
 * if iwl_uefi_get_reduced_power() returns an ERR_PTR() we
   try to kfree() it

Move the iwl_trans_set_reduce_power() call into the success
case only to fix these issues.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230314194113.aa2cf2281f5d.I33b4ab3427f1921c184c52fecd0f46781a89dc8a@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/pnvm.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright(c) 2020-2021 Intel Corporation
+ * Copyright(c) 2020-2022 Intel Corporation
  */
 
 #include "iwl-drv.h"
@@ -318,7 +318,6 @@ int iwl_pnvm_load(struct iwl_trans *trans,
 	kfree(data);
 
 skip_parse:
-	data = NULL;
 	/* now try to get the reduce power table, if not loaded yet */
 	if (!trans->reduce_power_loaded) {
 		data = iwl_uefi_get_reduced_power(trans, &len);
@@ -329,19 +328,16 @@ int iwl_pnvm_load(struct iwl_trans *trans,
 			 * trying again over and over.
 			 */
 			trans->reduce_power_loaded = true;
-
-			goto skip_reduce_power;
-		}
-	}
-
+		} else {
 			ret = iwl_trans_set_reduce_power(trans, data, len);
 			if (ret)
 				IWL_DEBUG_FW(trans,
 					     "Failed to set reduce power table %d\n",
 					     ret);
 			kfree(data);
+		}
+	}
 
-skip_reduce_power:
 	iwl_init_notification_wait(notif_wait, &pnvm_wait,
 				   ntf_cmds, ARRAY_SIZE(ntf_cmds),
 				   iwl_pnvm_complete_fn, trans);