Moved initialization of GT6426x Ethernet controller to board_eth_init()

Affected boards:
	EVB64260
	P3G4
	ZUMA

Removed initialization of the driver from net/eth.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/include/netdev.h b/include/netdev.h
index b1dadd8..666d12d 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -43,6 +43,7 @@
 /* Driver initialization prototypes */
 int bfin_EMAC_initialize(bd_t *bis);
 int greth_initialize(bd_t *bis);
+void gt6426x_eth_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);