Why does the mdio_addr1 signal at offset 0x10 have a value of '0' for the Triple Speed Ethernet IP core?

Description

Triple Speed Ethernet MegaCore® Function User Guide states that HW reset value for mdio_addr1 is '1'. This is applicable only if the MDIO option is turned on. If the MDIO option is turned off in your Triple Speed Ethernet IP instantiation, the HW reset value for mdio_addr1 is '0'.