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/iocon.h b/include/configs/iocon.h
index ae05bcb..38d473d 100644
--- a/include/configs/iocon.h
+++ b/include/configs/iocon.h
@@ -23,6 +23,7 @@
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_BOARD_EARLY_INIT_R
 #define CONFIG_LAST_STAGE_INIT
+#define CONFIG_SYS_GENERIC_BOARD
 
 #define CONFIG_SYS_CLK_FREQ	33333333 /* external frequency to pll   */