ARM: dts: vcu: define indexes for output clocks

The VCU System-Level Control has 4 output clocks. Define indexes for
these clocks to allow to reference them in the device tree.

Signed-off-by: Michael Tretter <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Acked-by: Stephen Boyd <[e-mail]>
Acked-by: Michal Simek <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>

include/dt-bindings/clock/xlnx-vcu.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Pengutronix, Michael Tretter <[e-mail]>
+ */
+
+#ifndef _DT_BINDINGS_CLOCK_XLNX_VCU_H
+#define _DT_BINDINGS_CLOCK_XLNX_VCU_H
+
+#define CLK_XVCU_ENC_CORE		0
+#define CLK_XVCU_ENC_MCU		1
+#define CLK_XVCU_DEC_CORE		2
+#define CLK_XVCU_DEC_MCU		3
+#define CLK_XVCU_NUM_CLOCKS		4
+
+#endif /* _DT_BINDINGS_CLOCK_XLNX_VCU_H */