Merge branch 'net-phy-realtek-improve-mmd-register-access-for-internal-phy-s'

Heiner Kallweit says:

====================
net: phy: realtek: improve MMD register access for internal PHY's

The integrated PHYs on chip versions from RTL8168g allow to address
MDIO_MMD_VEND2 registers. All c22 standard registers are mapped to
MDIO_MMD_VEND2 registers. So far the paging mechanism is used to
address PHY registers. Add support for c45 ops to address MDIO_MMD_VEND2
registers directly, w/o the paging.
====================

Link: https://patch.msgid.link/c6a969ef-fd7f-48d6-8c48-4bc548831a8d@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>