net: phy: aquantia: fill in possible_interfaces for AQR113C

Fill in the possible_interfaces bitmap for AQR113C so phylink knows
which interface modes will be used by the PHY.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/E1r6VI6-00DDLl-2D@rmk-PC.armlinux.org.uk


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