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/microblaze/lib/board.c b/arch/microblaze/lib/board.c
index 0ce040e..84267cd 100644
--- a/arch/microblaze/lib/board.c
+++ b/arch/microblaze/lib/board.c
@@ -122,7 +122,7 @@
 	puts ("SDRAM :\n");
 	printf ("\t\tIcache:%s\n", icache_status() ? "ON" : "OFF");
 	printf ("\t\tDcache:%s\n", dcache_status() ? "ON" : "OFF");
-	printf ("\tU-Boot Start:0x%08x\n", TEXT_BASE);
+	printf ("\tU-Boot Start:0x%08x\n", CONFIG_SYS_TEXT_BASE);
 
 #if defined(CONFIG_CMD_FLASH)
 	puts ("FLASH: ");