pwm: atmel-tcb: Delete an error message for a failed memory allocation

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-atmel-tcb.c

@@ -401,7 +401,6 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
 	tcbpwm = devm_kzalloc(&pdev->dev, sizeof(*tcbpwm), GFP_KERNEL);
 	if (tcbpwm == NULL) {
 		err = -ENOMEM;
-		dev_err(&pdev->dev, "failed to allocate memory\n");
 		goto err_free_tc;
 	}