[PATCH] gianfar: Use new PHY_ID_FMT macro

Make the driver produce the string used by phy_connect and have board specific
code pass the integer mii bus id and phy device id for the specific controller
instance.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>