AX88180: add missing init prototype

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

include/netdev.h

@@ -43,6 +43,7 @@ int cpu_eth_init(bd_t *bis);
 /* Driver initialization prototypes */
 int altera_tse_initialize(u8 dev_num, int mac_base,
 			  int sgdma_rx_base, int sgdma_tx_base);
+int ax88180_initialize(bd_t *bis);
 int au1x00_enet_initialize(bd_t*);
 int at91emac_register(bd_t *bis, unsigned long iobase);
 int bfin_EMAC_initialize(bd_t *bis);