phy/micrel: Change phy_id_mask for KSZ8721

There are KSZ8721 PHYs with phy_id 0x00221619. In order to detect them
as PHY_ID_KSZ8001 compatible while staying different to PHY_ID_KSZ9021
ignore the last two bits when matching PHY_ID
Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/micrel.c

@@ -869,7 +869,7 @@ static struct phy_driver ksphy_driver[] = {
 }, {
 	.phy_id		= PHY_ID_KSZ8001,
 	.name		= "Micrel KSZ8001 or KS8721",
-	.phy_id_mask	= 0x00ffffff,
+	.phy_id_mask	= 0x00fffffc,
 	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8041_type,
@@ -993,7 +993,7 @@ MODULE_LICENSE("GPL");
 static struct mdio_device_id __maybe_unused micrel_tbl[] = {
 	{ PHY_ID_KSZ9021, 0x000ffffe },
 	{ PHY_ID_KSZ9031, MICREL_PHY_ID_MASK },
-	{ PHY_ID_KSZ8001, 0x00ffffff },
+	{ PHY_ID_KSZ8001, 0x00fffffc },
 	{ PHY_ID_KS8737, MICREL_PHY_ID_MASK },
 	{ PHY_ID_KSZ8021, 0x00ffffff },
 	{ PHY_ID_KSZ8031, 0x00ffffff },