Add a KSZ8851SNL SPI Ethernet driver (IDFGH-4837)

[b1ackviking]

Implement the PHY and MAC layers in the driver similar to the W5500 driver.

Update Kconfig, CMakeLists.txt, and component.mk to incorporate the changes.

Resolves: #6542

[CLAassistant]

All committers have signed the CLA.

[Alvin1Zhang]

Thanks for your contribution.

[Alvin1Zhang]

Thanks for your contribution. We have purchased the hardware but not received now, will update once we have any updates. Thanks.

[b1ackviking]

Hello @Alvin1Zhang
Are there any updates? Have you managed to test the driver?

[Alvin1Zhang]

@b1ackviking Thanks for your contribution, and sorry for late reply, we are testing now, will share updates later.

[b1ackviking]

@Alvin1Zhang Thanks. I hope it won't take much time. Please keep me updated.

[david-cermak]

Thanks again for posting this PR. It has been internally approved and will be merged soon. Some minor changes will be applied in a separate commit, especially using the global error handling, introduced in 6792024 (which happened after your PR)

Sorry for the slow turnaround.

[b1ackviking]

@david-cermak Happy to see that, thanks.

[b1ackviking]

@Alvin1Zhang @david-cermak Is it OK that the bot has committed the files instead of merging the branch? The linked issue is now closed, but the PR remains open.

[suda-morris]

The bot can't "merge" and "close" this PR because we have rebased your commit, so Github can't match your original commit anywhere. Will close this PR manually.

[b1ackviking]

@suda-morris OK, thanks.