net: phy: marvell-88q2xxx: make mv88q2xxx_config_aneg generic

net: phy: marvell-88q2xxx: make mv88q2xxx_config_aneg generic

Marvell 88Q2xxx devices follow the same scheme, after configuration they
need a soft reset. Soft resets differ between devices, so we use the
.soft_reset callback instead of creating .config_aneg callbacks for each
device.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Dimitri Fedrau <dima.fedrau@gmail.com>
Link: https://lore.kernel.org/r/20240218075753.18067-11-dima.fedrau@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>