Closed issue by akce on void-packages repository

https://github.com/void-linux/void-packages/issues/39129

Description:
### Is this a new report?

Yes

### System Info

Void 5.15.61_1 armv6l Unknown uptodate rFFF

### Package(s) Affected

rpi-kernel-5.15_61_1

### Does a report exist for this bug with the project's home (upstream) and/or another distro?

_No response_

### Expected behaviour

eth0 link should be in state UP after startup. Here's how it looks with a working `rpi-kernel-5.10.110_1`:
```shell
$ uname -a
Linux mordor 5.10.110_1 #1 Wed Aug 3 16:47:21 UTC 2022 armv6l GNU/Linux
$ ip addr show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether b8:27:eb:bc:23:d3 brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.254/16 brd 192.168.255.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::ba27:ebff:febc:23d3/64 scope link 
       valid_lft forever preferred_lft forever
```
Here's the tail end of `dmesg` where i unplugged and then re-inserted the network cable:
```dmesg
[  134.196932] smsc95xx 1-1.1:1.0 eth0: Link is Down
[  143.525609] smsc95xx 1-1.1:1.0 eth0: Link is Up - 100Mbps/Full - flow control off
```

### Actual behaviour

On my rpi 1 model b+, **eth0** link is always in state DOWN; i haven't been able to bring it up.

With `rpi-kernel-5.15.61_1` i see:
```shell
$ uname -a
Linux mordor 5.15.61_1 #1 Mon Sep 5 02:23:47 UTC 2022 armv6l GNU/Linux
$ ip addr show eth0
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether b8:27:eb:bc:23:d3 brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.254/16 brd 192.168.255.255 scope global eth0
       valid_lft forever preferred_lft forever
```
Unplugging and re-inserting the network cable shows no activity in dmesg.

Orange and Green ethernet port LEDS are visible on the Raspberry Pi while the network cable is plugged in.

Manually running `ip link set eth0 up` returns success to the shell but has no effect to the link state.

/boot/config.txt has no overlays enabled.

### Steps to reproduce

Upgrade to `rpi-kernel-5.15-61_1` (presumably from [38958](https://github.com/void-linux/void-packages/pull/38958)).

Downgrading kernel to `rpi-kernel-5.10.110_1` restores eth0 to working state.

I did a full upgrade which included new `rpi-firmware` etc, but reverting only `rpi-kernel` was enough to get the network functional again.