zynqmp: Kconfig: Move zynqmp Kconfig

Move the zynqmp Kconfig from board to arch
as there may be different boards under same
architecture.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/Kconfig

@@ -874,6 +874,8 @@ source "arch/arm/mach-zynq/Kconfig"
 
 source "arch/arm/cpu/armv7/Kconfig"
 
+source "arch/arm/cpu/armv8/zynqmp/Kconfig"
+
 source "arch/arm/cpu/armv8/Kconfig"
 
 source "arch/arm/imx-common/Kconfig"
@@ -991,7 +993,6 @@ source "board/warp/Kconfig"
 source "board/woodburn/Kconfig"
 source "board/work-microwave/work_92105/Kconfig"
 source "board/xaeniax/Kconfig"
-source "board/xilinx/zynqmp/Kconfig"
 source "board/zipitz2/Kconfig"
 
 source "arch/arm/Kconfig.debug"