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/arch/sparc/cpu/leon3/Makefile b/arch/sparc/cpu/leon3/Makefile
index 182543d..64c67f8 100644
--- a/arch/sparc/cpu/leon3/Makefile
+++ b/arch/sparc/cpu/leon3/Makefile
@@ -44,8 +44,9 @@
 include $(SRCTREE)/rules.mk
 
 $(START): $(START:.o=.S)
-	$(CC) -D__ASSEMBLY__ $(DBGFLAGS) $(OPTFLAGS) -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \
-	-I$(TOPDIR)/include -fno-builtin -ffreestanding -nostdinc -isystem $(gccincdir) -pipe \
+	$(CC) -D__ASSEMBLY__ $(DBGFLAGS) $(OPTFLAGS) -D__KERNEL__ \
+	-DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) -I$(TOPDIR)/include \
+	-fno-builtin -ffreestanding -nostdinc -isystem $(gccincdir) -pipe \
 	$(PLATFORM_CPPFLAGS) -Wall -Wstrict-prototypes \
 	-I$(TOPDIR)/board -c -o $(START) $(START:.o=.S)