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/include/configs/MPC8536DS.h b/include/configs/MPC8536DS.h
index 8960963..8ef24e6 100644
--- a/include/configs/MPC8536DS.h
+++ b/include/configs/MPC8536DS.h
@@ -229,7 +229,7 @@
 #define CONFIG_SYS_FLASH_ERASE_TOUT	60000	/* Flash Erase Timeout (ms) */
 #define CONFIG_SYS_FLASH_WRITE_TOUT	500	/* Flash Write Timeout (ms) */
 
-#define CONFIG_SYS_MONITOR_BASE	TEXT_BASE	/* start of monitor */
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* start of monitor */
 
 #if defined(CONFIG_SYS_SPL) || defined(CONFIG_RAMBOOT_NAND) \
 	|| defined(CONFIG_RAMBOOT_SDCARD) || defined(CONFIG_RAMBOOT_SPIFLASH)
@@ -759,11 +759,11 @@
  "netdev=eth0\0"						\
  "uboot=" MK_STR(CONFIG_UBOOTPATH) "\0"				\
  "tftpflash=tftpboot $loadaddr $uboot; "			\
-	"protect off " MK_STR(TEXT_BASE) " +$filesize; "	\
-	"erase " MK_STR(TEXT_BASE) " +$filesize; "		\
-	"cp.b $loadaddr " MK_STR(TEXT_BASE) " $filesize; "	\
-	"protect on " MK_STR(TEXT_BASE) " +$filesize; "		\
-	"cmp.b $loadaddr " MK_STR(TEXT_BASE) " $filesize\0"	\
+	"protect off " MK_STR(CONFIG_SYS_TEXT_BASE) " +$filesize; "	\
+	"erase " MK_STR(CONFIG_SYS_TEXT_BASE) " +$filesize; "		\
+	"cp.b $loadaddr " MK_STR(CONFIG_SYS_TEXT_BASE) " $filesize; "	\
+	"protect on " MK_STR(CONFIG_SYS_TEXT_BASE) " +$filesize; "		\
+	"cmp.b $loadaddr " MK_STR(CONFIG_SYS_TEXT_BASE) " $filesize\0"	\
  "consoledev=ttyS0\0"				\
  "ramdiskaddr=2000000\0"			\
  "ramdiskfile=8536ds/ramdisk.uboot\0"		\