mei: hw: use sizeof of variable instead of struct type

Use sizeof(*dev) + sizeof(*hw) instead of
sizeof(struct mei_device) + sizeof(struct mei_me_hw)

There is a possibility of bug when variable type has changed but
corresponding struct passed to the sizeof has not.

Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200723145927.882743-6-tomas.winkler@intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/hw-me.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2003-2019, Intel Corporation. All rights reserved.
+ * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -1600,8 +1600,7 @@ struct mei_device *mei_me_dev_init(struct device *parent,
 	struct mei_me_hw *hw;
 	int i;
 
-	dev = devm_kzalloc(parent, sizeof(struct mei_device) +
-			   sizeof(struct mei_me_hw), GFP_KERNEL);
+	dev = devm_kzalloc(parent, sizeof(*dev) + sizeof(*hw), GFP_KERNEL);
 	if (!dev)
 		return NULL;
 

drivers/misc/mei/hw-txe.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2013-2019, Intel Corporation. All rights reserved.
+ * Copyright (c) 2013-2020, Intel Corporation. All rights reserved.
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -1201,8 +1201,7 @@ struct mei_device *mei_txe_dev_init(struct pci_dev *pdev)
 	struct mei_device *dev;
 	struct mei_txe_hw *hw;
 
-	dev = devm_kzalloc(&pdev->dev, sizeof(struct mei_device) +
-			   sizeof(struct mei_txe_hw), GFP_KERNEL);
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev) + sizeof(*hw), GFP_KERNEL);
 	if (!dev)
 		return NULL;