[BACKPORT] h7: eth: add checks for PHYID in stm32_phyinit

[dakejahl]

See apache/nuttx#15757

[davids5]

@dakejahl Please do a PX4 PR that will CI test this branch. Once that passes I will merge this branch and you can rebase the PX4 Branch to point to head in NuttX. Please see other backports and use the same naming constructs. in your PRs.

[dakejahl]

Please see other backports and use the same naming constructs. in your PRs.

Are you referring to the commit message? This is the same commit message as the upstream commit. I think you're saying I should have named it arch/stm32h7 instead of h7?

[dakejahl]

PX4 PR here
PX4/PX4-Autopilot#24348

[davids5]

@dakejahl Please resolve the nuttx related build issues.

[dakejahl]

@dakejahl Please resolve the nuttx related build issues.

The only nuttx related build issue is flash overflow on fmu-v6x, unrelated to this PR

[dakejahl]

@davids5

[davids5]

@davids5

@dakejahl Please spend the time to fix the embedded build. coordinate with @dagar

[dakejahl]

@davids5 there are no issues with the embedded build. Please take a look at the checks
https://github.com/PX4/PX4-Autopilot/pull/24348/checks