i2c: Improve size determinations

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding
size determination a bit safer according to the Linux coding style
convention.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-nomadik.c

@@ -970,7 +970,7 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
 	struct i2c_vendor_data *vendor = id->data;
 	u32 max_fifo_threshold = (vendor->fifodepth / 2) - 1;
 
-	dev = devm_kzalloc(&adev->dev, sizeof(struct nmk_i2c_dev), GFP_KERNEL);
+	dev = devm_kzalloc(&adev->dev, sizeof(*dev), GFP_KERNEL);
 	if (!dev) {
 		ret = -ENOMEM;
 		goto err_no_mem;

drivers/i2c/busses/i2c-sh7760.c

@@ -443,7 +443,7 @@ static int sh7760_i2c_probe(struct platform_device *pdev)
 		goto out0;
 	}
 
-	id = kzalloc(sizeof(struct cami2c), GFP_KERNEL);
+	id = kzalloc(sizeof(*id), GFP_KERNEL);
 	if (!id) {
 		ret = -ENOMEM;
 		goto out0;