dt-bindings: clock: Add R8A77970 CPG core clock definitions

Add macros usable by the device tree sources to reference the R8A77970
CPG core clocks by index. The data come from the table 8.2c of R-Car
Series, 3rd Generation User's Manual: Hardware (Rev. 0.55, Jun. 30, 2017).

Based on the original (and large) patch by Daisuke Matsushita
<daisuke.matsushita.ns@hitachi.com>.

Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

include/dt-bindings/clock/r8a77970-cpg-mssr.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2016 Renesas Electronics Corp.
+ * Copyright (C) 2017 Cogent Embedded, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#ifndef __DT_BINDINGS_CLOCK_R8A77970_CPG_MSSR_H__
+#define __DT_BINDINGS_CLOCK_R8A77970_CPG_MSSR_H__
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/* r8a77970 CPG Core Clocks */
+#define R8A77970_CLK_Z2			0
+#define R8A77970_CLK_ZR			1
+#define R8A77970_CLK_ZTR		2
+#define R8A77970_CLK_ZTRD2		3
+#define R8A77970_CLK_ZT			4
+#define R8A77970_CLK_ZX			5
+#define R8A77970_CLK_S1D1		6
+#define R8A77970_CLK_S1D2		7
+#define R8A77970_CLK_S1D4		8
+#define R8A77970_CLK_S2D1		9
+#define R8A77970_CLK_S2D2		10
+#define R8A77970_CLK_S2D4		11
+#define R8A77970_CLK_LB			12
+#define R8A77970_CLK_CL			13
+#define R8A77970_CLK_ZB3		14
+#define R8A77970_CLK_ZB3D2		15
+#define R8A77970_CLK_DDR		16
+#define R8A77970_CLK_CR			17
+#define R8A77970_CLK_CRD2		18
+#define R8A77970_CLK_SD0H		19
+#define R8A77970_CLK_SD0		20
+#define R8A77970_CLK_RPC		21
+#define R8A77970_CLK_RPCD2		22
+#define R8A77970_CLK_MSO		23
+#define R8A77970_CLK_CANFD		24
+#define R8A77970_CLK_CSI0		25
+#define R8A77970_CLK_FRAY		26
+#define R8A77970_CLK_CP			27
+#define R8A77970_CLK_CPEX		28
+#define R8A77970_CLK_R			29
+#define R8A77970_CLK_OSC		30
+
+#endif /* __DT_BINDINGS_CLOCK_R8A77970_CPG_MSSR_H__ */