pwm: Fill in missing .owner fields

Some drivers don't set the .owner fields of the struct device_driver or
struct pwm_ops, which causes the module usage count to become wrong.

Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/drivers/pwm/pwm-pca9685.c b/drivers/pwm/pwm-pca9685.c
index 2afc904..c9f9e65 100644
--- a/drivers/pwm/pwm-pca9685.c
+++ b/drivers/pwm/pwm-pca9685.c
@@ -199,6 +199,7 @@
 	.config = pca9685_pwm_config,
 	.request = pca9685_pwm_request,
 	.free = pca9685_pwm_free,
+	.owner = THIS_MODULE,
 };
 
 static struct regmap_config pca9685_regmap_i2c_config = {