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/purple.h b/include/configs/purple.h
index 2573aa1..25d8ebe 100644
--- a/include/configs/purple.h
+++ b/include/configs/purple.h
@@ -134,7 +134,7 @@
 #define PHYS_FLASH_1		0xb0000000 /* Flash Bank #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_FLASH_BASE		PHYS_FLASH_1