dt-bindings: net: sparx5: don't require a reset line

Make the reset line optional. It turns out, there is no dedicated reset
for the switch. Instead, the reset which was used up until now, was kind
of a global reset. This is now handled elsewhere, thus don't require a
reset.

Signed-off-by: Michael Walle <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml

···
   - reg-names
   - interrupts
   - interrupt-names
-  - resets
-  - reset-names
   - ethernet-ports
 
 additionalProperties: false