net: mscc: ocelot: return directly in ocelot_cls_flower_{replace, destroy}

There is no need to check the "ret" variable, one can just return the
function result back to the caller.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Allan W. Nielsen <allan.nielsen@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>