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/assabet.h b/include/configs/assabet.h
index d17d4bd..58cdbd5 100644
--- a/include/configs/assabet.h
+++ b/include/configs/assabet.h
@@ -140,7 +140,7 @@
 #define PHYS_FLASH_BANK_SIZE    0x01000000	/* 16 MB Banks */
 #define PHYS_FLASH_SECT_SIZE    0x00040000	/* 256 KB sectors (x2) */
 
-#define CONFIG_SYS_MONITOR_BASE        TEXT_BASE
+#define CONFIG_SYS_MONITOR_BASE        CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_MONITOR_LEN         (256 * 1024)	/* Reserve 256 KB for Monitor */
 
 #if CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE