arm64: add ZTE ZX SoC family

This patch introduces ARCH_ZX to add the support of the ZTE ZX SoC
family for the arm64 architecture.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index bb2616b..1fe2a58 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -204,6 +204,11 @@
 	help
 	  This enables support for AppliedMicro X-Gene SOC Family
 
+config ARCH_ZX
+	bool "ZTE ZX SoC Family"
+	help
+	  This enables support for ZTE ZX SoC Family
+
 config ARCH_ZYNQMP
 	bool "Xilinx ZynqMP Family"
 	help