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
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