of/irq: make of_msi_map_get_device_domain() bus agnostic

of_msi_map_get_device_domain() is PCI specific but it need not be and
can be easily changed to be bus agnostic in order to be used by other
busses by adding an IRQ domain bus token as an input parameter.

Signed-off-by: Diana Craciun <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Acked-by: Bjorn Helgaas <[email protected]>   # pci/msi.c
Cc: Bjorn Helgaas <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>

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