net: bcmasp: Add support for re-starting auto-negotiation

Wire-up ethtool_ops::nway_reset to phy_ethtool_nway_reset in order to
support re-starting auto-negotiation.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250717180915.2611890-1-florian.fainelli@broadcom.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>