generic: fix c45 soft reset for RTL8221B

generic: fix c45 soft reset for RTL8221B

The addition of the soft_reset() function to the RTL8221B PHYs
missed to take care of C22/C45 standalone PHY versions. Especially
on RTL930x switch devices with these PHY the reset fails for the
C45 operation mode. This comes from the fact that the mdio bus
disables C22 read/writes when being set to C45.

Upstream has gained a proper C45 reset function. Use it for the
C45 PHY models.

Fixes: 7e3284eef7f ("generic: use genphy_soft_reset for RealTek 2.5G PHYs")
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19843
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>