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-spear.c b/drivers/pwm/pwm-spear.c
index 6d99e2c..a54d214 100644
--- a/drivers/pwm/pwm-spear.c
+++ b/drivers/pwm/pwm-spear.c
@@ -259,6 +259,7 @@
 static struct platform_driver spear_pwm_driver = {
 	.driver = {
 		.name = "spear-pwm",
+		.owner = THIS_MODULE,
 		.of_match_table = spear_pwm_of_match,
 	},
 	.probe = spear_pwm_probe,