[PATCH net-next v5 3/3] net: xilinx: axienet: Fix IRQ error handling

[Bui Duc Phuc]

>
> Critical: 0 · High: 1 · Medium: 0 (1) · Low: 0
>
> - [High] Incomplete fix: the axistream-connected branch of
>   axienet_probe() still cannot request a probe retry, and this patch now…
>

irq_of_parse_and_map() has always folded every failure into plain 0,
with no way to tell "not ready yet" from "malformed DT". Before this
patch, that 0 was already turned into a terminal -ENOMEM, not
-EPROBE_DEFER, so there was no retry path to begin with - this patch
doesn't remove one, it's a pre-existing API-level limitation.

> Pre-existing issues:
> - [Medium] DT binding and driver disagree on interrupt index ordering.
>

This is a pre-existing issue, unrelated to this patch. I'll keep this
patch's scope as is.