dt-bindings: clock: add R8A77980 CPG core clock definitions

Add macros usable by the device tree sources to reference the R8A77980
CPG core clocks by index. The data come from the table 8.2e of the R-Car
Series, 3rd Generation User's Manual: Hardware (Rev. 0.80, Oct, 2017),
however I had to add the Z2 clock which is somehow present only on the
figure 8.1e...

Based on the original (and large) patch by Vladimir Barinov.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

include/dt-bindings/clock/r8a77980-cpg-mssr.h

+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Renesas Electronics Corp.
+ * Copyright (C) 2018 Cogent Embedded, Inc.
+ */
+#ifndef __DT_BINDINGS_CLOCK_R8A77980_CPG_MSSR_H__
+#define __DT_BINDINGS_CLOCK_R8A77980_CPG_MSSR_H__
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/* r8a77980 CPG Core Clocks */
+#define R8A77980_CLK_Z2			0
+#define R8A77980_CLK_ZR			1
+#define R8A77980_CLK_ZTR		2
+#define R8A77980_CLK_ZTRD2		3
+#define R8A77980_CLK_ZT			4
+#define R8A77980_CLK_ZX			5
+#define R8A77980_CLK_S0D1		6
+#define R8A77980_CLK_S0D2		7
+#define R8A77980_CLK_S0D3		8
+#define R8A77980_CLK_S0D4		9
+#define R8A77980_CLK_S0D6		10
+#define R8A77980_CLK_S0D12		11
+#define R8A77980_CLK_S0D24		12
+#define R8A77980_CLK_S1D1		13
+#define R8A77980_CLK_S1D2		14
+#define R8A77980_CLK_S1D4		15
+#define R8A77980_CLK_S2D1		16
+#define R8A77980_CLK_S2D2		17
+#define R8A77980_CLK_S2D4		18
+#define R8A77980_CLK_S3D1		19
+#define R8A77980_CLK_S3D2		20
+#define R8A77980_CLK_S3D4		21
+#define R8A77980_CLK_LB			22
+#define R8A77980_CLK_CL			23
+#define R8A77980_CLK_ZB3		24
+#define R8A77980_CLK_ZB3D2		25
+#define R8A77980_CLK_ZB3D4		26
+#define R8A77980_CLK_SD0H		27
+#define R8A77980_CLK_SD0		28
+#define R8A77980_CLK_RPC		29
+#define R8A77980_CLK_RPCD2		30
+#define R8A77980_CLK_MSO		31
+#define R8A77980_CLK_CANFD		32
+#define R8A77980_CLK_CSI0		33
+#define R8A77980_CLK_CP			34
+#define R8A77980_CLK_CPEX		35
+#define R8A77980_CLK_R			36
+#define R8A77980_CLK_OSC		37
+
+#endif /* __DT_BINDINGS_CLOCK_R8A77980_CPG_MSSR_H__ */