net: phy: aquantia: add support for AQCS109

Add support for the AQCS109. From software point of view,
it should be almost equivalent to AQR107.

v2:
- make Nikita the author
- document what I changed

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[hkallweit1@gmail.com: use PHY_ID_MATCH_MODEL mascro]
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>