board: Add CONFIG_SYS_GENERIC_BOARD to all gdsys boards

Add the generic board infrastructure to all gdsys boards.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/io.h b/include/configs/io.h
index 8e32c25..d4ae0ad 100644
--- a/include/configs/io.h
+++ b/include/configs/io.h
@@ -24,6 +24,7 @@
 #define CONFIG_BOARD_EARLY_INIT_R
 #define CONFIG_MISC_INIT_R
 #define CONFIG_LAST_STAGE_INIT
+#define CONFIG_SYS_GENERIC_BOARD
 
 #define CONFIG_SYS_CLK_FREQ	33333333 /* external frequency to pll   */