Add upstream fix for AARCH64 irq name parsing.
> On arm64 SoCs like TI's K3 SoC and few other SoCs,
> IRQ names don't get parsed correct due to which they
> end up being classified into wrong class. Fix this by
> considering last token to contain IRQ name always.
The fix seems to enable e.g. RT3200 to notice a few more
interrupts and start balancing them.
Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
