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/siemens/IAD210/config.mk b/board/siemens/IAD210/config.mk
index c30abcb..2204f8d 100644
--- a/board/siemens/IAD210/config.mk
+++ b/board/siemens/IAD210/config.mk
@@ -29,5 +29,5 @@
 # iad210 boards
 #
 
-TEXT_BASE = 0x08000000
-/*TEXT_BASE  = 0x00200000 */
+CONFIG_SYS_TEXT_BASE = 0x08000000
+/*CONFIG_SYS_TEXT_BASE  = 0x00200000 */
diff --git a/board/siemens/SCM/config.mk b/board/siemens/SCM/config.mk
index 5d0898b..50446d3 100644
--- a/board/siemens/SCM/config.mk
+++ b/board/siemens/SCM/config.mk
@@ -29,6 +29,7 @@
 # for the "final" configuration, with U-Boot in flash, or the address
 # in RAM where U-Boot is loaded at for debugging.
 #
-TEXT_BASE = 0x40000000
+CONFIG_SYS_TEXT_BASE = 0x40000000
 
-PLATFORM_CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) -I$(TOPDIR)
+PLATFORM_CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) \
+	-I$(TOPDIR)
diff --git a/board/siemens/SMN42/config.mk b/board/siemens/SMN42/config.mk
index b28f418..4891792 100644
--- a/board/siemens/SMN42/config.mk
+++ b/board/siemens/SMN42/config.mk
@@ -26,5 +26,5 @@
 #
 
 #address where u-boot will be relocated
-#TEXT_BASE = 0x0
-TEXT_BASE = 0x81500000
+#CONFIG_SYS_TEXT_BASE = 0x0
+CONFIG_SYS_TEXT_BASE = 0x81500000
diff --git a/board/siemens/SMN42/lowlevel_init.S b/board/siemens/SMN42/lowlevel_init.S
index f13d9b9..44e209b 100644
--- a/board/siemens/SMN42/lowlevel_init.S
+++ b/board/siemens/SMN42/lowlevel_init.S
@@ -38,7 +38,7 @@
 #define   IO0_VALUE   0x4000C
 
 _TEXT_BASE:
-	.word	TEXT_BASE
+	.word	CONFIG_SYS_TEXT_BASE
 MEMMAP_ADR:
 	.word	MEMMAP
 BCFG0_ADR: