samples: dhcpv4_client: enable it on the fvp_baser_aemv8r board

.. code-block:: console

    $ ping -I eth1 192.0.2.10

Arm FVP

========

* :ref:`fvp_baser_aemv8r`

This sample application running on Arm FVP board can negotiate IP

address from DHCPv4 server running on Arm FVP, so there is no extra

configuration that needed to do. It can be build and run directly.

Build Zephyr samples/net/dhcpv4_client application:

.. zephyr-app-commands::

   :zephyr-app: samples/net/dhcpv4_client

   :host-os: unix

   :board: fvp_baser_aemv8r

   :goals: build run

   :compact:

Once DHCPv4 client address negotiation completed with server, details

are shown like this:

.. code-block:: console

    uart:~$

    [00:00:00.060,000] <inf> phy_mii: PHY (0) ID 16F840

    [00:00:00.170,000] <inf> phy_mii: PHY (0) Link speed 10 Mb, half duplex

    [00:00:00.170,000] <inf> eth_smsc91x: MAC 00:02:f7:ef:37:16

    *** Booting Zephyr OS build zephyr-v3.2.0-4300-g3e6505dba29e ***

    [00:00:00.170,000] <inf> net_dhcpv4_client_sample: Run dhcpv4 client

    [00:00:07.180,000] <inf> net_dhcpv4: Received: 172.20.51.1

    [00:00:07.180,000] <inf> net_dhcpv4_client_sample: Your address: 172.20.51.1

    [00:00:07.180,000] <inf> net_dhcpv4_client_sample: Lease time: 86400 seconds

    [00:00:07.180,000] <inf> net_dhcpv4_client_sample: Subnet: 255.255.255.0

    [00:00:07.180,000] <inf> net_dhcpv4_client_sample: Router: 172.20.51.254

CONFIG_NET_L2_ETHERNET=y

CONFIG_MDIO=y

CONFIG_MDIO_SHELL=n

CONFIG_MDIO_INIT_PRIORITY=81

CONFIG_PHY_INIT_PRIORITY=82

&eth {

	status = "okay";

};

&phy {

	status = "okay";

};

&mdio {

	status = "okay";

};