drm: make kernel context switch same as for drm git tree.

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/drm_lock.c b/drivers/char/drm/drm_lock.c
index 116ed0f..e9993ba 100644
--- a/drivers/char/drm/drm_lock.c
+++ b/drivers/char/drm/drm_lock.c
@@ -182,7 +182,7 @@
 	 * modules but is required by the Sparc driver.
 	 */
 	if (dev->driver->kernel_context_switch_unlock)
-		dev->driver->kernel_context_switch_unlock(dev, &lock);
+		dev->driver->kernel_context_switch_unlock(dev);
 	else {
 		drm_lock_transfer(dev, &dev->lock.hw_lock->lock,
 				  DRM_KERNEL_CONTEXT);