net: phy: at803x: fix spacing and improve name for 83xx phy

Fix spacing and improve name for 83xx phy following other phy in the
same driver.

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