dt-bindings: arm: Fix typo in zcu111 board

Trivial fix.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/13d064fc4850f96904a04e330cea5295d3751e46.1611226560.git.michal.simek@xilinx.com

Documentation/devicetree/bindings/arm/xilinx.yaml

@@ -108,7 +108,7 @@ properties:
         items:
           - enum:
               - xlnx,zynqmp-zcu111-revA
-              - xlnx,zynqmp-zcu11-rev1.0
+              - xlnx,zynqmp-zcu111-rev1.0
           - const: xlnx,zynqmp-zcu111
           - const: xlnx,zynqmp