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/ATUM8548.h b/include/configs/ATUM8548.h
index 58f0c1f..388234c 100644
--- a/include/configs/ATUM8548.h
+++ b/include/configs/ATUM8548.h
@@ -173,7 +173,7 @@
 #define CONFIG_SYS_FLASH_WRITE_TOUT	8000	/* Flash Write Timeout (ms) */
 
 
-#define CONFIG_SYS_MONITOR_BASE	TEXT_BASE	/* start of monitor */
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* start of monitor */
 
 #define CONFIG_FLASH_CFI_DRIVER    1
 #define CONFIG_SYS_FLASH_CFI           1