Boot stuck

The weird part in your case is your hang happens when

[   29.207841] pcieport 0008:00:00.0: Adding to iommu group 8
[   29.207922] pcieport 0008:00:00.0: PME: Signaling with IRQ 186
[   29.208222] pcieport 0008:00:00.0: AER: enabled with IRQ 186

But this is PCIe C8 which is nothing to do with 14160000.pcie