net: phy: Add PHY driver for mv88e61xx switches

The previous mv88e61xx driver was a driver for configuring the
switch, but did not integrate with the PHY/networking system, so
it could not be used as a PHY by U-boot.  This is a complete
rework to support this device as a PHY.

Signed-off-by: Kevin Smith <kevin.smith@elecsyscorp.com>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Marek Vasut <marex@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/phy/phy.c

@@ -458,6 +458,9 @@ static LIST_HEAD(phy_drivers);
 
 int phy_init(void)
 {
+#ifdef CONFIG_MV88E61XX_SWITCH
+	phy_mv88e61xx_init();
+#endif
 #ifdef CONFIG_PHY_AQUANTIA
 	phy_aquantia_init();
 #endif

include/phy.h

@@ -249,6 +249,7 @@ int gen10g_startup(struct phy_device *phydev);
 int gen10g_shutdown(struct phy_device *phydev);
 int gen10g_discover_mmds(struct phy_device *phydev);
 
+int phy_mv88e61xx_init(void);
 int phy_aquantia_init(void);
 int phy_atheros_init(void);
 int phy_broadcom_init(void);