dt-bindings: net: dp83822: Add TI dp83822 phy

Add a dt binding for the TI dp83822 ethernet phy device.

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