The Energy Detect feature which is part of EEE defaults to off on both
hardware and software reset to enter "normal 10/100/1000 Mbps operation"
but this change makes it explicit, as with other PHYs in that family.

Note that, if EEE was enabled, an errata would apply which requires a
certain sequence of magic register writes. Linux and other systems have
that errata implemented, but we don't need it yet.

ok?

diff --git a/sys/dev/mii/eephy.c b/sys/dev/mii/eephy.c
index c99bac094dd..075c4836197 100644
--- a/sys/dev/mii/eephy.c
+++ b/sys/dev/mii/eephy.c
@@ -273,6 +273,7 @@ eephy_reset(struct mii_softc *sc)
 	case MII_MODEL_MARVELL_E1011:
 	case MII_MODEL_MARVELL_E1111:
 	case MII_MODEL_MARVELL_E1112:
+	case MII_MODEL_MARVELL_E1512:
 	case MII_MODEL_MARVELL_PHYG65G:
 		reg &= ~E1000_SCR_EN_DETECT_MASK;
 		break;