PCI: hv: Get vPCI MSI IRQ domain from DeviceTree

PCI: hv: Get vPCI MSI IRQ domain from DeviceTree

The hyperv-pci driver uses ACPI for MSI IRQ domain configuration on
arm64. It won't be able to do that in the VTL mode where only DeviceTree
can be used.

Update the hyperv-pci driver to get vPCI MSI IRQ domain in the DeviceTree
case, too.

Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/20250428210742.435282-12-romank@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250428210742.435282-12-romank@linux.microsoft.com>