board: samsung: add support for Galaxy A series of 2017 (a5y17lte)

Samsung Galaxy A3, A5, A7 (2017) - middle class Samsung smartphones.
U-boot can be used as chain-loaded bootloader to gain control
on booting vanilla linux(and possibly others) kernels

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 7df0e17..7f3aee5 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -151,6 +151,33 @@
 	select PINCTRL_EXYNOS7420
 	select SUPPORT_SPL
 
+config  TARGET_A5Y17LTE
+	bool "Samsung SM-A520F board"
+	select ARM64
+	select CLK_EXYNOS
+	select OF_CONTROL
+	select PINCTRL
+	select PINCTRL_EXYNOS78x0
+	select SUPPORT_SPL
+
+config  TARGET_A7Y17LTE
+	bool "Samsung SM-A520F board"
+	select ARM64
+	select CLK_EXYNOS
+	select OF_CONTROL
+	select PINCTRL
+	select PINCTRL_EXYNOS78x0
+	select SUPPORT_SPL
+
+config  TARGET_A3Y17LTE
+	bool "Samsung SM-A520F board"
+	select ARM64
+	select CLK_EXYNOS
+	select OF_CONTROL
+	select PINCTRL
+	select PINCTRL_EXYNOS7880
+	select SUPPORT_SPL
+
 endchoice
 endif
 
@@ -167,6 +194,7 @@
 source "board/samsung/smdk5250/Kconfig"
 source "board/samsung/smdk5420/Kconfig"
 source "board/samsung/espresso7420/Kconfig"
+source "board/samsung/axy17lte/Kconfig"
 
 config SPL_LDSCRIPT
 	default "board/samsung/common/exynos-uboot-spl.lds" if ARCH_EXYNOS5 || ARCH_EXYNOS4