arm64: dts: microchip: sparx5_pcb134: drop LED unit addresses

arm64: dts: microchip: sparx5_pcb134: drop LED unit addresses

GPIO leds should not have unit addresses (no "reg" property), as
reported by dtc W=1 warnings:

  sparx5_pcb134_board.dtsi:18.9-21.5: Warning (unit_address_vs_reg): /leds/led@0: node has a unit name, but no reg or ranges property

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>