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/dbau1x00.h b/include/configs/dbau1x00.h
index b439c80..d8c9362 100644
--- a/include/configs/dbau1x00.h
+++ b/include/configs/dbau1x00.h
@@ -186,7 +186,7 @@
 #define CONFIG_FLASH_CFI_DRIVER    1
 
 /* The following #defines are needed to get flash environment right */
-#define	CONFIG_SYS_MONITOR_BASE	TEXT_BASE
+#define	CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
 #define	CONFIG_SYS_MONITOR_LEN		(192 << 10)
 
 #define CONFIG_SYS_INIT_SP_OFFSET	0x400000