ARM: zynq: rename CONFIG_ZYNQ to CONFIG_ARCH_ZYNQ

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 21cd1c8..4870020 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -644,7 +644,7 @@
 	bool "Support Colibri VF50/61"
 	select CPU_V7
 
-config ZYNQ
+config ARCH_ZYNQ
 	bool "Xilinx Zynq Platform"
 	select CPU_V7
 	select SUPPORT_SPL