riscv: Add support for AMD/Xilinx MicroBlaze V

MicroBlaze V is new AMD/Xilinx soft-core 32bit RISC-V processor IP.
It is hardware compatible with classic MicroBlaze processor.

The patch contains initial wiring and configuration for initial HW design
with memory, cpu, interrupt controller, timers and uartlite console
(interrupt controller is listed but U-Boot is not using it).

Provided DT is just describing one configuration and should be taken only
as example.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Padmarao Begari <padmarao.begari@microchip.com>
diff --git a/arch/riscv/dts/Makefile b/arch/riscv/dts/Makefile
index be6c8a4..b05bb56 100644
--- a/arch/riscv/dts/Makefile
+++ b/arch/riscv/dts/Makefile
@@ -9,6 +9,8 @@
 dtb-$(CONFIG_TARGET_SIPEED_MAIX) += k210-maix-bit.dtb
 dtb-$(CONFIG_TARGET_STARFIVE_VISIONFIVE2) += jh7110-starfive-visionfive-2.dtb
 dtb-$(CONFIG_TARGET_TH1520_LPI4A) += th1520-lichee-pi-4a.dtb
+dtb-$(CONFIG_TARGET_XILINX_MBV) += xilinx-mbv32.dtb
+
 include $(srctree)/scripts/Makefile.dts
 
 targets += $(dtb-y)