pci: fdt: fix: add pci-probe-only property to the chosen node

The `pci-probe-only` property tells the guest to preserve any PCI
resource assignment done by the firmware (VMM in this case).
Since we do not support BAR relocation, this is a valid way to tell
the guest to not relocate anything.

The absence of this property did not cause any issues so far. But this
can change. Add this property explicitly to prevent potential future
issues.

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>

Author: ShadowCurse

src/vmm/src/arch/aarch64/fdt.rs

@@ -272,6 +272,10 @@ fn create_chosen_node(
         )?;
     }
 
+    // Prevent the kernel from reassigning PCI BAR addresses.
+    // https://elixir.bootlin.com/linux/v6.19.8/source/drivers/pci/of.c#L255
+    fdt.property_u32("linux,pci-probe-only", 1)?;
+
     fdt.end_node(chosen)?;
 
     Ok(())