Add PCIe phy bindings for the ZCU102.

Link: https://lore.kernel.org/r/20240531161337.864994-8-sean.anderson@linux.devTested-by: Thippeswamy Havalige <thippeswamy.havalige@amd.com>
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <michal.simek@amd.com>