net: Correct dependencies for HIFEMAC_ETH

The HIFEMAC_ETH functionality can only work with both DM_ETH_PHY and
DM_MDIO enabled (it calls one of the functions that requires both), so
express this dependency in Kconfig.

Signed-off-by: Tom Rini <trini@konsulko.com>

drivers/net/Kconfig

@@ -983,6 +983,8 @@ config HIFEMAC_ETH
 	depends on DM && OF_CONTROL
 	select CLK
 	select DM_CLK
+	select DM_ETH_PHY
+	select DM_MDIO
 	select DM_RESET
 	select PHYLIB
 	help