i2c: exynos: Update Kconfig documentation

Update the help text to reflect current support devices:
1. The Exynos high speed I2C driver supports Exynos5 (ARMv7), Exynos5433
   and Exynos7 (both ARMv8) SoCs,
2. The S3C I2C driver supports S3C, S5Pv210 and Exynos{3,4,5} SoCs.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/Kconfig

@@ -612,12 +612,12 @@ config I2C_EMEV2
 	  I2C interface on the Renesas Electronics EM/EV family of processors.
 
 config I2C_EXYNOS5
-	tristate "Exynos5 high-speed I2C driver"
+	tristate "Exynos high-speed I2C driver"
 	depends on OF
 	depends on ARCH_EXYNOS || COMPILE_TEST
 	default y if ARCH_EXYNOS
 	help
-	  High-speed I2C controller on Exynos5 based Samsung SoCs.
+	  High-speed I2C controller on Exynos5 and newer Samsung SoCs.
 
 config I2C_GPIO
 	tristate "GPIO-based bitbanging I2C"
@@ -936,11 +936,11 @@ config HAVE_S3C2410_I2C
 	  respective Kconfig file.
 
 config I2C_S3C2410
-	tristate "S3C2410 I2C Driver"
+	tristate "S3C/Exynos I2C Driver"
 	depends on HAVE_S3C2410_I2C || COMPILE_TEST
 	help
 	  Say Y here to include support for I2C controller in the
-	  Samsung SoCs.
+	  Samsung SoCs (S3C, S5Pv210, Exynos).
 
 config I2C_SH7760
 	tristate "Renesas SH7760 I2C Controller"