Export functions required by Aquntia PHY firmware load application.
functions are memset, strcpy, mdelay, mdio_get_current_dev,
phy_find_by_mask, mdio_phydev_for_ethname and miiphy_set_current_dev

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>