staging: wilc1000: remove label from examples in DT binding documentation

Remove labels and not relevant property from DT binding documentation
examples as suggested in [1].

1. https://patchwork.ozlabs.org/patch/1252837



Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Link: https://lore.kernel.org/r/20200325164234.14146-1-ajay.kathat@microchip.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>