arm64: dts: qcom: sa8155p-adp: Remove unused properties from eth node

The 'snps,ptp-ref-clk-rate' and 'snps,ptp-req-clk-rate' properties
are not supported by the stmmac driver currently, so remove
them from the sa8155p-adp ethernet node as well.

Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220907204153.2039776-1-bhupesh.sharma@linaro.org

arch/arm64/boot/dts/qcom/sa8155p-adp.dts

@@ -333,9 +333,6 @@ &ethernet {
 	snps,reset-active-low;
 	snps,reset-delays-us = <0 11000 70000>;
 
-	snps,ptp-ref-clk-rate = <250000000>;
-	snps,ptp-req-clk-rate = <96000000>;
-
 	snps,mtl-rx-config = <&mtl_rx_setup>;
 	snps,mtl-tx-config = <&mtl_tx_setup>;