arm64: dts: exynos: Rename Samsung and Exynos to lowercase

Fix up inconsistent usage of upper and lowercase letters in "Samsung"
and "Exynos" names.

"SAMSUNG" and "EXYNOS" are not abbreviations but regular trademarked
names.  Therefore they should be written with lowercase letters starting
with capital letter.

The lowercase "Exynos" name is promoted by its manufacturer Samsung
Electronics Co., Ltd., in advertisement materials and on website.

Although advertisement materials usually use uppercase "SAMSUNG", the
lowercase version is used in all legal aspects (e.g. on Wikipedia and in
privacy/legal statements on
https://www.samsung.com/semiconductor/privacy-global/).

Link: https://lore.kernel.org/r/20200117190305.5257-1-krzk@kernel.orgSigned-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * SAMSUNG Exynos5433 TM2 board device tree source
+ * Samsung Exynos5433 TM2 board device tree source
  *
  * Copyright (c) 2016 Samsung Electronics Co., Ltd.
  *

arch/arm64/boot/dts/exynos/exynos5433-tm2.dts

 // SPDX-License-Identifier: GPL-2.0
 /*
- * SAMSUNG Exynos5433 TM2 board device tree source
+ * Samsung Exynos5433 TM2 board device tree source
  *
  * Copyright (c) 2016 Samsung Electronics Co., Ltd.
  *

arch/arm64/boot/dts/exynos/exynos5433-tm2e.dts

 // SPDX-License-Identifier: GPL-2.0
 /*
- * SAMSUNG Exynos5433 TM2E board device tree source
+ * Samsung Exynos5433 TM2E board device tree source
  *
  * Copyright (c) 2016 Samsung Electronics Co., Ltd.
  *

arch/arm64/boot/dts/exynos/exynos7-espresso.dts

 // SPDX-License-Identifier: GPL-2.0
 /*
- * SAMSUNG Exynos7 Espresso board device tree source
+ * Samsung Exynos7 Espresso board device tree source
  *
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
@@ -13,7 +13,7 @@
 #include <dt-bindings/gpio/gpio.h>
 
 / {
-	model = "Samsung Exynos7 Espresso board based on EXYNOS7";
+	model = "Samsung Exynos7 Espresso board based on Exynos7";
 	compatible = "samsung,exynos7-espresso", "samsung,exynos7";
 
 	aliases {

arch/arm64/boot/dts/exynos/exynos7.dtsi

 // SPDX-License-Identifier: GPL-2.0
 /*
- * SAMSUNG EXYNOS7 SoC device tree source
+ * Samsung Exynos7 SoC device tree source
  *
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com