backlight: lm3630a: explicitly apply PWM config extracted from pwm_args

Call pwm_apply_args() just after requesting the PWM device so that the
polarity and period are initialized according to the information
provided in pwm_args.

This is an intermediate state, and pwm_apply_args() should be dropped as
soon as the atomic PWM infrastructure is in place and the driver makes
use of it.

Signed-off-by: Boris Brezillon <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/video/backlight/lm3630a_bl.c

···
 			dev_err(&client->dev, "fail : get pwm device\n");
 			return PTR_ERR(pchip->pwmd);
 		}
+
+		/*
+		 * FIXME: pwm_apply_args() should be removed when switching to
+		 * the atomic PWM API.
+		 */
+		pwm_apply_args(pchip->pwmd);
 	}
 
 	/* interrupt enable  : irq 0 is not allowed */