fec: Fix fec_enet_alloc_buffers() error path When fec_enet_alloc_buffers() fails we should better undo the previous actions, which consists of: disabling the FEC clocks and putting the FEC pins into inactive state. The error path for fec_enet_mii_probe() is kept unchanged. Signed-off-by: Fabio Estevam <[email protected]> Signed-off-by: David S. Miller <[email protected]>