This patch adds supports for mdio bus. A later path adds PHYLIB
support on the top of this.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Link: https://patch.msgid.link/20240623235507.108147-7-fujita.tomonori@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>