Blackfin: cm-bf561: add example settings for EXT-BF5xx-USB-ETH2 add-on

The cm-bf561 module can easily hook up to the EXT-BF5xx-USB-ETH2 extender
board, so add a simple example of how to do that in the board config.
Signed-off-by: NHarald Krapfenbauer <Harald.Krapfenbauer@bluetechnix.at>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

include/configs/cm-bf561.h

@@ -60,8 +60,13 @@
  * Network Settings
  */
 #define ADI_CMDS_NETWORK	1
+/* The next 2 lines are for use with DEV-BF5xx */
 #define CONFIG_DRIVER_SMC91111	1
 #define CONFIG_SMC91111_BASE	0x28000300
+/* The next 3 lines are for use with EXT-BF5xx-USB-ETH2 */
+/* #define CONFIG_DRIVER_SMC911X 1 */
+/* #define CONFIG_DRIVER_SMC911X_BASE 0x24080000 // AMS1 */
+/* #define CONFIG_DRIVER_SMC911X_32_BIT 1 */
 #define CONFIG_HOSTNAME		cm-bf561
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:cf */