backlight: lm3630a_bl: Handle deferred probe

Don't pollute dmesg on deferred probe and simplify the code with
dev_err_probe().

Reviewed-by: Daniel Thompson <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: krzk

drivers/video/backlight/lm3630a_bl.c

@@ -560,10 +560,9 @@ static int lm3630a_probe(struct i2c_client *client)
 	/* pwm */
 	if (pdata->pwm_ctrl != LM3630A_PWM_DISABLE) {
 		pchip->pwmd = devm_pwm_get(pchip->dev, "lm3630a-pwm");
-		if (IS_ERR(pchip->pwmd)) {
-			dev_err(&client->dev, "fail : get pwm device\n");
-			return PTR_ERR(pchip->pwmd);
-		}
+		if (IS_ERR(pchip->pwmd))
+			return dev_err_probe(&client->dev, PTR_ERR(pchip->pwmd),
+					     "fail : get pwm device\n");
 
 		pwm_init_state(pchip->pwmd, &pchip->pwmd_state);
 	}