Documentation/bindings: net: the sfp i2c-bus property is now mandatory

The i2c-bus property for sfp modules was made mandatory. Update the
documentation to keep it in sync with the driver's behaviour.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed