Fix missing exports for net/phy/mdio-bitbang.c

{alloc,free}_mdio_bitbang() are not exported while they are used in
mdio-ofgpio driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
1 file changed