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/sequoia.h b/include/configs/sequoia.h
index 988d41f..cfda957 100644
--- a/include/configs/sequoia.h
+++ b/include/configs/sequoia.h
@@ -53,7 +53,7 @@
 
 /*
  * Define this if you want support for video console with radeon 9200 pci card
- * Also set TEXT_BASE to 0xFFF80000 in board/amcc/sequoia/config.mk in this case
+ * Also set CONFIG_SYS_TEXT_BASE to 0xFFF80000 in board/amcc/sequoia/config.mk in this case
  */
 #undef CONFIG_VIDEO