drm/nouveau: move compat ioctl out of nouveau_drv.h

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_ioctl.h b/drivers/gpu/drm/nouveau/nouveau_ioctl.h
new file mode 100644
index 0000000..ef2b290
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_ioctl.h
@@ -0,0 +1,6 @@
+#ifndef __NOUVEAU_IOCTL_H__
+#define __NOUVEAU_IOCTL_H__
+
+long nouveau_compat_ioctl(struct file *, unsigned int cmd, unsigned long arg);
+
+#endif