arm64: dts: qcom: x1e80100: add missing PCIe minimum OPP

commit 98abf2f upstream.

Add the missing PCIe CX performance level votes to avoid relying on
other drivers (e.g. USB) to maintain the nominal performance level
required for Gen3 speeds.

Fixes: 5eb83fc ("arm64: dts: qcom: x1e80100: Add PCIe nodes")
Cc: stable@vger.kernel.org	# 6.9
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240722094249.26471-4-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm64/boot/dts/qcom/x1e80100.dtsi

@@ -2814,6 +2814,7 @@
 				      "link_down";
 
 			power-domains = <&gcc GCC_PCIE_6A_GDSC>;
+			required-opps = <&rpmhpd_opp_nom>;
 
 			phys = <&pcie6a_phy>;
 			phy-names = "pciephy";
@@ -2935,6 +2936,7 @@
 				      "link_down";
 
 			power-domains = <&gcc GCC_PCIE_4_GDSC>;
+			required-opps = <&rpmhpd_opp_nom>;
 
 			phys = <&pcie4_phy>;
 			phy-names = "pciephy";