net: phy: DP83822: Add support for additional DP83825 devices

Add PHY IDs for the DP83825CS, DP83825CM and the DP83825S devices to the
DP83822 driver.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>