dt-bindings: interrupt-controller: arm,gic-v3: Fix typo in description of msi-controller property

Fix typo functionnality -> functionality.
Signed-off-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Link: https://lore.kernel.org/r/20230130234335.13952-1-prabhakar.csengg@gmail.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml

@@ -108,7 +108,7 @@ properties:
 
   msi-controller:
     description:
-      Only present if the Message Based Interrupt functionnality is
+      Only present if the Message Based Interrupt functionality is
       being exposed by the HW, and the mbi-ranges property present.
 
   mbi-ranges: