arm64: dts: qcom: sc8280xp-crd: limit pcie4 link speed

Limit the WiFi PCIe link speed to Gen2 speed (500 MB/s), which is the
speed that Windows uses.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20240223152124.20042-7-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: jhovold

arch/arm64/boot/dts/qcom/sc8280xp-crd.dts

@@ -563,6 +563,8 @@
 };
 
 &pcie4 {
+	max-link-speed = <2>;
+
 	perst-gpios = <&tlmm 141 GPIO_ACTIVE_LOW>;
 	wake-gpios = <&tlmm 139 GPIO_ACTIVE_LOW>;