xilinx: Enable mkfwumdata tool for a/b update for Kria

Build mkfwumdata tool by default for building ab mdata structure.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/641e7759275cfe673ffcee2000a6c34224f0c5d5.1738910629.git.michal.simek@amd.com
diff --git a/configs/xilinx_zynqmp_kria_defconfig b/configs/xilinx_zynqmp_kria_defconfig
index 1f8e8c3..16cd8c3 100644
--- a/configs/xilinx_zynqmp_kria_defconfig
+++ b/configs/xilinx_zynqmp_kria_defconfig
@@ -228,3 +228,4 @@
 CONFIG_MBEDTLS_LIB=y
 CONFIG_TPM=y
 CONFIG_SPL_GZIP=y
+CONFIG_TOOLS_MKFWUMDATA=y