drm/radeon/kms: drop lock in return path of radeon_fence_count_emitted.

Silly bad return path.

Reported-and-Tested-by: Mikko Vinni
Reviewed-by: Alex Deucher <[e-mail]>
CC: [e-mail]
Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/drm/radeon/radeon_fence.c

···
 	int not_processed = 0;
 
 	read_lock_irqsave(&rdev->fence_lock, irq_flags);
-	if (!rdev->fence_drv[ring].initialized)
+	if (!rdev->fence_drv[ring].initialized) {
+		read_unlock_irqrestore(&rdev->fence_lock, irq_flags);
 		return 0;
+	}
 
 	if (!list_empty(&rdev->fence_drv[ring].emitted)) {
 		struct list_head *ptr;