dt-bindings: Sync versaclock.h with upcoming 5.12-rc1

The versaclock doesn't have a driver yet, but there are a bunch
of device tree updates for the Beacon RZ/G2 boards that won't
compile without these.  A driver is coming, so sync the bindings
for now

Signed-off-by: Adam Ford <aford173@gmail.com>

include/dt-bindings/clk/versaclock.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* This file defines field values used by the versaclock 6 family
+ * for defining output type
+ */
+
+#define VC5_LVPECL	0
+#define VC5_CMOS	1
+#define VC5_HCSL33	2
+#define VC5_LVDS	3
+#define VC5_CMOS2	4
+#define VC5_CMOSD	5
+#define VC5_HCSL25	6