hwspinlock/core: simplify 'owner' handling

Use struct device_driver's owner member instead of asking drivers to
explicitly pass the owner again.

This simplifies drivers and also save some memory, since there's no
point now in maintaining a separate owner pointer per hwspinlock.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c
index a8f0273..1d19fe9 100644
--- a/drivers/hwspinlock/omap_hwspinlock.c
+++ b/drivers/hwspinlock/omap_hwspinlock.c
@@ -143,7 +143,6 @@
 		}
 
 		omap_lock->lock.dev = &pdev->dev;
-		omap_lock->lock.owner = THIS_MODULE;
 		omap_lock->lock.id = i;
 		omap_lock->lock.ops = &omap_hwspinlock_ops;
 		omap_lock->addr = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
@@ -208,6 +207,7 @@
 	.remove		= omap_hwspinlock_remove,
 	.driver		= {
 		.name	= "omap_hwspinlock",
+		.owner	= THIS_MODULE,
 	},
 };