galaxy5200: enable version environment variable

Add version environment variable configuration to the galaxy5200
board header file.

Signed-off-by: Eric Millbrandt <emillbrandt@dekaresearch.com>

Edited commit message.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/configs/galaxy5200.h b/include/configs/galaxy5200.h
index f4b520d..3b67ea9 100644
--- a/include/configs/galaxy5200.h
+++ b/include/configs/galaxy5200.h
@@ -367,6 +367,8 @@
 				 CONFIG_BOOTP_DNS2 | \
 				 CONFIG_BOOTP_SEND_HOSTNAME )
 
+#define CONFIG_VERSION_VARIABLE 1
+
 /*
  * Various low-level settings
  */