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/ZPC1900.h b/include/configs/ZPC1900.h
index 8ae765c..d0dc067 100644
--- a/include/configs/ZPC1900.h
+++ b/include/configs/ZPC1900.h
@@ -215,7 +215,7 @@
 #define BOOTFLAG_COLD		0x01	/* Normal Power-On: Boot from FLASH */
 #define BOOTFLAG_WARM		0x02	/* Software reboot                  */
 
-#define CONFIG_SYS_MONITOR_BASE	TEXT_BASE
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
 #if (CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE)
 #define CONFIG_SYS_RAMBOOT
 #endif