memory: samsung: Rename Exynos to lowercase

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

"EXYNOS" is not an abbreviation but a regular trademarked name.
Therefore it 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.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

drivers/memory/samsung/Kconfig

@@ -8,7 +8,7 @@ config SAMSUNG_MC
 if SAMSUNG_MC
 
 config EXYNOS5422_DMC
-	tristate "EXYNOS5422 Dynamic Memory Controller driver"
+	tristate "Exynos5422 Dynamic Memory Controller driver"
 	depends on ARCH_EXYNOS || (COMPILE_TEST && HAS_IOMEM)
 	select DDR
 	depends on DEVFREQ_GOV_SIMPLE_ONDEMAND

drivers/memory/samsung/exynos-srom.c

@@ -3,7 +3,7 @@
 // Copyright (c) 2015 Samsung Electronics Co., Ltd.
 //	      http://www.samsung.com/
 //
-// EXYNOS - SROM Controller support
+// Exynos - SROM Controller support
 // Author: Pankaj Dubey <pankaj.dubey@samsung.com>
 
 #include <linux/io.h>