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/onenand_ipl/board/apollon/Makefile b/onenand_ipl/board/apollon/Makefile
index 6f1df01..5397186 100644
--- a/onenand_ipl/board/apollon/Makefile
+++ b/onenand_ipl/board/apollon/Makefile
@@ -3,7 +3,7 @@
 include $(TOPDIR)/onenand_ipl/board/$(BOARDDIR)/config.mk
 
 LDSCRIPT= $(TOPDIR)/onenand_ipl/board/$(BOARDDIR)/u-boot.onenand.lds
-LDFLAGS	= -Bstatic -T $(onenandobj)u-boot.lds -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
+LDFLAGS	= -Bstatic -T $(onenandobj)u-boot.lds -Ttext $(CONFIG_SYS_TEXT_BASE) $(PLATFORM_LDFLAGS)
 AFLAGS	+= -DCONFIG_PRELOADER -DCONFIG_ONENAND_IPL
 CFLAGS	+= -DCONFIG_PRELOADER -DCONFIG_ONENAND_IPL
 OBJCFLAGS += --gap-fill=0x00