ARM: imx6ul: Fix Micrel PHY mask

BugLink: http://bugs.launchpad.net/bugs/1607404

commit 20c15226 upstream.

The value used for Micrel PHY mask is not correct. Use the
MICREL_PHY_ID_MASK definition instead.

Thanks to Jiri Luznicky for proposing the fix at
https://community.freescale.com/thread/387739

Fixes: 709bc065 ("ARM: imx6ul: add fec MAC refrence clock and phy fixup init")
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

arch/arm/mach-imx/mach-imx6ul.c

@@ -46,7 +46,7 @@ static int ksz8081_phy_fixup(struct phy_device *dev)
 static void __init imx6ul_enet_phy_init(void)
 {
 	if (IS_BUILTIN(CONFIG_PHYLIB))
-		phy_register_fixup_for_uid(PHY_ID_KSZ8081, 0xffffffff,
+		phy_register_fixup_for_uid(PHY_ID_KSZ8081, MICREL_PHY_ID_MASK,
 					   ksz8081_phy_fixup);
 }