brcm63xx: fix bcm63268 rgmii port rgmii configuration

This should rather be done by passing appropriate platform_data/OF, but
should suffice for now.

Fixes e.g. GbE ports on BCM963268BU_P300.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 45505

target/linux/brcm63xx/patches-3.18/804-bcm63xx_enet_63268_rgmii_ports.patch

@@ -0,0 +1,13 @@
+--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
++++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+@@ -2272,6 +2272,10 @@ static int bcm_enetsw_open(struct net_de
+ 
+ 		rgmii_ctrl = enetsw_readb(priv, ENETSW_RGMII_CTRL_REG(i));
+ 		rgmii_ctrl |= ENETSW_RGMII_CTRL_GMII_CLK_EN;
++		if (BCMCPU_IS_63268()) {
++			rgmii_ctrl |= ENETSW_RGMII_CTRL_TIMING_SEL_EN;
++			rgmii_ctrl |= ENETSW_RGMII_CTRL_MII_OVERRIDE_EN;
++		}
+ 		enetsw_writeb(priv, rgmii_ctrl, ENETSW_RGMII_CTRL_REG(i));
+ 	}
+