Input: imx6ul_tsc - use the preferred method for kzalloc()

According to Documentation/CodingStyle:

"The preferred form for passing a size of a struct is the following:

	p = kmalloc(sizeof(*p), ...);"

so do as suggested.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/imx6ul_tsc.c

@@ -347,7 +347,7 @@ static int imx6ul_tsc_probe(struct platform_device *pdev)
 	int tsc_irq;
 	int adc_irq;
 
-	tsc = devm_kzalloc(&pdev->dev, sizeof(struct imx6ul_tsc), GFP_KERNEL);
+	tsc = devm_kzalloc(&pdev->dev, sizeof(*tsc), GFP_KERNEL);
 	if (!tsc)
 		return -ENOMEM;