arm64: dts: renesas: Include R-Car product name in DTSI files

Browsing the DTS for all the R-Car SoCs with similar part numbers
makes my head hurt, so to improve the user friendliness of the
DTS code base include R-Car product name in each DTSI file.

Product names are derived from
Documentation/devicetree/bindings/arm/shmobile.txt
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a7795-es1.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source for the r8a7795 ES1.x SoC
+ * Device Tree Source for the R-Car H3 (R8A77950) ES1.x SoC
  *
  * Copyright (C) 2015 Renesas Electronics Corp.
  */

arch/arm64/boot/dts/renesas/r8a7795.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source for the r8a7795 SoC
+ * Device Tree Source for the R-Car H3 (R8A77950) SoC
  *
  * Copyright (C) 2015 Renesas Electronics Corp.
  */

arch/arm64/boot/dts/renesas/r8a7796.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source for the r8a7796 SoC
+ * Device Tree Source for the R-Car M3-W (R8A77960) SoC
  *
  * Copyright (C) 2016-2017 Renesas Electronics Corp.
  */

arch/arm64/boot/dts/renesas/r8a77965.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source for the r8a77965 SoC
+ * Device Tree Source for the R-Car M3-N (R8A77965) SoC
  *
  * Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
  *

arch/arm64/boot/dts/renesas/r8a77970.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source for the r8a77970 SoC
+ * Device Tree Source for the R-Car V3M (R8A77970) SoC
  *
  * Copyright (C) 2016-2017 Renesas Electronics Corp.
  * Copyright (C) 2017 Cogent Embedded, Inc.

arch/arm64/boot/dts/renesas/r8a77980.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source for the r8a77980 SoC
+ * Device Tree Source for the R-Car V3H (R8A77980) SoC
  *
  * Copyright (C) 2018 Renesas Electronics Corp.
  * Copyright (C) 2018 Cogent Embedded, Inc.

arch/arm64/boot/dts/renesas/r8a77990.dtsi

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Device Tree Source for the r8a77990 SoC
+ * Device Tree Source for the R-Car E3 (R8A77990) SoC
  *
  * Copyright (C) 2018 Renesas Electronics Corp.
  */

arch/arm64/boot/dts/renesas/r8a77995.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source for the r8a77995 SoC
+ * Device Tree Source for the R-Car D3 (R8A77995) SoC
  *
  * Copyright (C) 2016 Renesas Electronics Corp.
  * Copyright (C) 2017 Glider bvba