arm64: defconfig: enable ZTE ZX related config

This patch enables the configuration for the ZTE ZX family.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 0555b7c..060b796 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -54,6 +54,7 @@
 CONFIG_ARCH_VEXPRESS=y
 CONFIG_ARCH_VULCAN=y
 CONFIG_ARCH_XGENE=y
+CONFIG_ARCH_ZX=y
 CONFIG_ARCH_ZYNQMP=y
 CONFIG_PCI=y
 CONFIG_PCI_MSI=y