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/tools/Makefile b/tools/Makefile
index 8ec92d2..619c9f2 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -145,7 +145,8 @@
 		-idirafter $(OBJTREE)/include \
 	        -I $(SRCTREE)/lib/libfdt \
 		-I $(SRCTREE)/tools \
-		-DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC \
+		-DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) \
+		-DUSE_HOSTCC \
 		-D__KERNEL_STRICT_NAMES