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/board/xilinx/ppc405-generic/u-boot-rom.lds b/board/xilinx/ppc405-generic/u-boot-rom.lds
index 65d0e4d..074f3c2 100644
--- a/board/xilinx/ppc405-generic/u-boot-rom.lds
+++ b/board/xilinx/ppc405-generic/u-boot-rom.lds
@@ -134,7 +134,7 @@
    *(COMMON)
   }
 
-  ppcenv_assert = ASSERT(. < 0xFFFFB000, ".bss section too big, overlaps .ppcenv section. Please update your configuration: CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_LEN and TEXT_BASE may need to be modified.");
+  ppcenv_assert = ASSERT(. < 0xFFFFB000, ".bss section too big, overlaps .ppcenv section. Please update your configuration: CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_LEN and CONFIG_SYS_TEXT_BASE may need to be modified.");
 
   _end = . ;
   PROVIDE (end = .);