Moved initialization of IncaIP Ethernet controller to board_eth_init

Affected boards:
	IncaIP

Removed initialization of the driver from net/eth.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

include/netdev.h

@@ -45,6 +45,7 @@ int bfin_EMAC_initialize(bd_t *bis);
 int eth_3com_initialize (bd_t * bis);
 int greth_initialize(bd_t *bis);
 void gt6426x_eth_initialize(bd_t *bis);
+int inca_switch_initialize(bd_t *bis);
 int macb_eth_initialize(int id, void *regs, unsigned int phy_addr);
 int mcdmafec_initialize(bd_t *bis);
 int mcffec_initialize(bd_t *bis);