net: phy: at803x: add support for qca 8327 internal phy

Add support for qca8327 internal phy needed for correct init of the
switch port. It does use the same qca8337 function and reg just with a
different id.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Tested-by: Rosen Penev <rosenp@gmail.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>