dt-bindings: fsi: Remove ibm,fsi2spi-restricted compatible

Remove this compatible string from the FSI SPI controller
documentation, since the security restrictions have been
universally applied to the controllers.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210716133915.14697-3-eajames@linux.ibm.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/fsi/ibm,fsi2spi.yaml

@@ -19,7 +19,6 @@ properties:
   compatible:
     enum:
       - ibm,fsi2spi
-      - ibm,fsi2spi-restricted
 
   reg:
     items: