xen/arm: extend fdt_property_interrupts to support DomU

xen/arm: extend fdt_property_interrupts to support DomU

The domain and fdt can be found in the structure kinfo.
Rather than adding a an extra argument for the domain, pass directly
kinfo.
This also requires to adapt fdt_property_interrupts() prototype.
A follow-up patch will need to create the interrupts for either Dom0 or
DomU.

Suggested-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Viktor Mitin <viktor_mitin@epam.com>
Reviewed-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Acked-by: Julien Grall <julien.grall@arm.com>