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/nand_spl/board/freescale/mpc8569mds/Makefile b/nand_spl/board/freescale/mpc8569mds/Makefile
index 3d0936a..d1c0ef8 100644
--- a/nand_spl/board/freescale/mpc8569mds/Makefile
+++ b/nand_spl/board/freescale/mpc8569mds/Makefile
@@ -24,13 +24,13 @@
 #
 
 NAND_SPL := y
-TEXT_BASE := 0xfff00000
+CONFIG_SYS_TEXT_BASE := 0xfff00000
 PAD_TO := 0xfff01000
 
 include $(TOPDIR)/config.mk
 
 LDSCRIPT= $(TOPDIR)/$(CPUDIR)/u-boot-nand_spl.lds
-LDFLAGS	= -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
+LDFLAGS	= -Bstatic -T $(LDSCRIPT) -Ttext $(CONFIG_SYS_TEXT_BASE) $(PLATFORM_LDFLAGS)
 AFLAGS	+= -DCONFIG_NAND_SPL
 CFLAGS	+= -DCONFIG_NAND_SPL