net: sh_eth: change the condition of initialization

The SH7757 has 2 Fast Ethernet and 2 Gigabit Ethernet, and the first
Gigabit channel needs the initialization. So, this patch adds the
parameter of "needs_init", and if the sh_eth_plat_data is set it
to 1, the driver will initialize the channel.

Signed-off-by: Yoshihiro Shimoda <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/renesas/sh_eth.c

···
 	/* read and set MAC address */
 	read_mac_address(ndev, pd->mac_addr);
 
-	/* First device only init */
-	if (!devno) {
+	/* initialize first or needed device */
+	if (!devno || pd->needs_init) {
 		if (mdp->cd->tsu) {
 			struct resource *rtsu;
 			rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);

include/linux/sh_eth.h

···
 	unsigned char mac_addr[6];
 	unsigned no_ether_link:1;
 	unsigned ether_link_active_low:1;
+	unsigned needs_init:1;
 };
 
 #endif