dt-bindings: mfd: gateworks-gsc: Remove unnecessary fan-controller nodes

Remove the unnecessary #address-cells and #size-cells nodes from
the fan-controller. These are not needed as the fan controller does not
have any children.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230612162444.3936302-1-tharvey@gateworks.com


Signed-off-by: Lee Jones <lee@kernel.org>