pwm: tiehrpwm: use dev_err() instead of pr_err()

Use dev_err() instead of pr_err() to provide a better message
to userspace.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-tiehrpwm.c

@@ -360,8 +360,8 @@ static int ehrpwm_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 	/* Enable TBCLK before enabling PWM device */
 	ret = clk_enable(pc->tbclk);
 	if (ret) {
-		pr_err("Failed to enable TBCLK for %s\n",
-				dev_name(pc->chip.dev));
+		dev_err(chip->dev, "Failed to enable TBCLK for %s\n",
+			dev_name(pc->chip.dev));
 		return ret;
 	}