arm64: dts: qcom: lemans: Add PCIe lane equalization preset properties

arm64: dts: qcom: lemans: Add PCIe lane equalization preset properties

Add PCIe lane equalization preset properties with all values set to 5 for
8.0 GT/s and 16.0 GT/s data rates to enhance link stability.

Co-developed-by: Qiang Yu <qiang.yu@oss.qualcomm.com>
Signed-off-by: Qiang Yu <qiang.yu@oss.qualcomm.com>
Signed-off-by: Ziyue Zhang <ziyue.zhang@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://lore.kernel.org/r/20250904065225.1762793-4-ziyue.zhang@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>