Introduce LS1028A PCI MDIO driver.

[lha_semihalf.com]

Summary

Implement support for the NXP LS1028A SoC MDIO controller.
It is attached to the internal PCI root complex.
The controller is used to communicate with PHYs of ports connected
to the internal switch.

[manu]

sys/dev/enetc/enetc_mdio_pci.c

109

You might want to use some table for this so it would be easier to use the PNPINFO macros for module autoloading.

132

Typo : reosurces -> resources

[lha_semihalf.com]

Applied changes after @manu review.

[manu]

sys/conf/files.arm64

179

This is an fdt-only driver so add fdt here in the depends

[lha_semihalf.com]

Add fdt in the depends.

[emaste]

sys/dev/enetc/enetc_mdio_pci.c

17

Suggest updating the disclaimer text to the standard AUTHOR AND CONTRIBUTORS version - from the top-level COPYRIGHT file:

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

[lha_semihalf.com]

Update the disclaimer text to current version.