arm64: add Kconfig entry for LG1K SoC family

This patch introduces ARCH_LG1K to enable LG Electronics's LG1K SoC
family in Kconfig.
Signed-off-by: Chanho Min <chanho.min@lge.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm64/Kconfig.platforms

@@ -43,6 +43,11 @@ config ARCH_LAYERSCAPE
 	help
 	  This enables support for the Freescale Layerscape SoC family.
 
+config ARCH_LG1K
+	bool "LG Electronics LG1K SoC Family"
+	help
+	  This enables support for LG Electronics LG1K SoC Family
+
 config ARCH_HISI
 	bool "Hisilicon SoC Family"
 	select HISILICON_IRQ_MBIGEN