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/ppmc7xx.h b/include/configs/ppmc7xx.h
index 04779c4..8e807f5 100644
--- a/include/configs/ppmc7xx.h
+++ b/include/configs/ppmc7xx.h
@@ -240,7 +240,7 @@
  * CONFIG_SYS_MALLOC_LEN		- Size of malloc pool (128KB)
  */
 
-#define CONFIG_SYS_MONITOR_BASE	TEXT_BASE
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_MALLOC_LEN		0x20000