mpc85xx: TL-WDR4900: Fix port 6 being shown as up (10MBit/half) in LUCI/swconfig

Currently port 6 is shown as up 10MBit/half in LUCI and swconfig.
Reason is that all bits in the port 6 config are zero.
This means that also the aneg flag is not set and in this case
ar8216_read_port_link hardcodes the link to be up.

This is no real problem but a little annoying.
To fix this initialize port 6 with the aneg bit enabled.
This causes ar8216_read_port_link to evaluate the link status bit which is
always zero for port 6 as no PHY is connected to this port.
And it doesn't hurt as port 6 isn't connected to anything on TL-WDR4900.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>

SVN-Revision: 45749

target/linux/mpc85xx/files/arch/powerpc/boot/dts/tl-wdr4900-v1.dts

@@ -103,6 +103,7 @@
 					0x00058 0xcf35cf35 /* LED_CTRL2 */
 					0x0005c 0x03ffff00 /* LED_CTRL3 */
 					0x0007c 0x0000007e /* PORT0_STATUS */
+					0x00094 0x00000200 /* PORT6_STATUS */
 				>;
 			};
 		};