blackfin: bf609: add softswitch config command

Add softswitch_output command for bf609-ezkit to enable softswitches.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
diff --git a/include/configs/bf609-ezkit.h b/include/configs/bf609-ezkit.h
index 8b90129..f0ac86b 100644
--- a/include/configs/bf609-ezkit.h
+++ b/include/configs/bf609-ezkit.h
@@ -144,6 +144,7 @@
 #define CONFIG_UART_CONSOLE	0
 
 #define CONFIG_CMD_MEMORY
+#define CONFIG_CMD_SOFTSWITCH
 
 #define CONFIG_SYS_MEMTEST_END (CONFIG_STACKBASE - 20*1024*1024 + 4)
 #define CONFIG_BFIN_SOFT_SWITCH