ARM: dts: renesas: Fix R-Car spelling

The correct spelling is R-Car, including the dash, update the usage.
Comment change only, no functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

arch/arm/dts/r8a7790-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A7790 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A7790 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a7791-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A7791 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A7791 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a7792-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A7792 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A7792 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a7793-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A7793 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A7793 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a7794-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A7794 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A7794 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a77951-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A7795 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A7795 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a77960-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A7796 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A7796 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a77965-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A77965 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A77965 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a77970-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A77970 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A77970 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a77980-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A77980 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A77980 SoC
  *
  * Copyright (C) 2019 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a77990-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A77990 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A77990 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a77995-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar R8A77995 SoC
+ * Device Tree Source extras for U-Boot on R-Car R8A77995 SoC
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */

arch/arm/dts/r8a779x-u-boot.dtsi

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Device Tree Source extras for U-Boot on RCar Gen3
+ * Device Tree Source extras for U-Boot on R-Car Gen3
  *
  * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
  */