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/CANBT.h b/include/configs/CANBT.h
index ad075b8..c7854ab 100644
--- a/include/configs/CANBT.h
+++ b/include/configs/CANBT.h
@@ -127,8 +127,8 @@
  */
 #define CONFIG_SYS_SDRAM_BASE		0x00000000
 #define CONFIG_SYS_FLASH_BASE		CONFIG_SYS_MONITOR_BASE
-#define CONFIG_SYS_MONITOR_BASE		TEXT_BASE
-#define CONFIG_SYS_MONITOR_LEN		(~(TEXT_BASE) + 1)
+#define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_MONITOR_LEN		(~(CONFIG_SYS_TEXT_BASE) + 1)
 #define CONFIG_SYS_MALLOC_LEN		(128 * 1024)	/* Reserve 128 kB for malloc()	*/
 
 /*