Moved initialization of RTL8139 Ethernet controller to board_eth_init()

Affected boards:
	hidden_dragon
	MPC8544DS
	MPC8610HPCN
	R2DPLUS
	TB0229

Removed initialization of the driver from net/eth.c

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

board/r2dplus/r2dplus.c

@@ -76,3 +76,8 @@ void pci_init_board(void)
 {
 	pci_sh7751_init(&hose);
 }
+
+int board_eth_init(bd_t *bis)
+{
+	return pci_eth_init(bis);
+}