Rename TEXT_BASE into CONFIG_SYS_TEXT_BASE

The change is currently needed to be able to remove the board
configuration scripting from the top level Makefile and replace it by
a simple, table driven script.

Moving this configuration setting into the "CONFIG_*" name space is
also desirable because it is needed if we ever should move forward to
a Kconfig driven configuration system.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/configs/HIDDEN_DRAGON.h b/include/configs/HIDDEN_DRAGON.h
index 251fe67..359187a 100644
--- a/include/configs/HIDDEN_DRAGON.h
+++ b/include/configs/HIDDEN_DRAGON.h
@@ -131,7 +131,7 @@
 #else
 #undef	CONFIG_SYS_RAMBOOT
 #define CONFIG_SYS_MONITOR_LEN		0x00030000
-#define CONFIG_SYS_MONITOR_BASE	TEXT_BASE
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
 
 #define CONFIG_SYS_GBL_DATA_SIZE	128