arm64: dts: qcom: sm8450: remove invalid power-domain-names in pcie nodes

Fixes the following DT bindings check error:
pci@1c00000: Unevaluated properties are not allowed ('power-domain-names' were unexpected)
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230323-topic-sm8450-upstream-dt-bindings-fixes-v2-3-0ca1bea1a843@linaro.org

arch/arm64/boot/dts/qcom/sm8450.dtsi

@@ -1798,7 +1798,6 @@ pcie0: pci@1c00000 {
 			reset-names = "pci";
 
 			power-domains = <&gcc PCIE_0_GDSC>;
-			power-domain-names = "gdsc";
 
 			phys = <&pcie0_lane>;
 			phy-names = "pciephy";
@@ -1912,7 +1911,6 @@ pcie1: pci@1c08000 {
 			reset-names = "pci";
 
 			power-domains = <&gcc PCIE_1_GDSC>;
-			power-domain-names = "gdsc";
 
 			phys = <&pcie1_lane>;
 			phy-names = "pciephy";