net: phy: atheros: Fix the masks for AR8031/8035

Use the same masks as used in the kernel:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/drivers/net/phy/at803x.c?id=refs/tags/v3.12.6

With such changes Ethernet is functional on hummingboard solo.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Marek Vasut <marex@denx.de>
Patch: 306640

drivers/net/phy/atheros.c

@@ -50,7 +50,7 @@ static struct phy_driver AR8021_driver =  {
 static struct phy_driver AR8031_driver =  {
 	.name = "AR8031/AR8033",
 	.uid = 0x4dd074,
-	.mask = 0x4fffff,
+	.mask = 0xffffffef,
 	.features = PHY_GBIT_FEATURES,
 	.config = ar8021_config,
 	.startup = genphy_startup,
@@ -60,7 +60,7 @@ static struct phy_driver AR8031_driver =  {
 static struct phy_driver AR8035_driver =  {
 	.name = "AR8035",
 	.uid = 0x4dd072,
-	.mask = 0x4fffff,
+	.mask = 0xffffffef,
 	.features = PHY_GBIT_FEATURES,
 	.config = ar8035_config,
 	.startup = genphy_startup,