Rename CONFIG_SYS_TEXT_BASE to CONFIG_TEXT_BASE

The current name is inconsistent with SPL which uses CONFIG_SPL_TEXT_BASE
and this makes it imposible to use CONFIG_VAL().

Rename it to resolve this problem.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/MPC837XERDB.h b/include/configs/MPC837XERDB.h
index c2f4f2b..edf9b34 100644
--- a/include/configs/MPC837XERDB.h
+++ b/include/configs/MPC837XERDB.h
@@ -256,15 +256,15 @@
 	"netdev=" CONFIG_NETDEV "\0"				\
 	"uboot=" CONFIG_UBOOTPATH "\0"					\
 	"tftpflash=tftp $loadaddr $uboot;"				\
-		"protect off " __stringify(CONFIG_SYS_TEXT_BASE)	\
+		"protect off " __stringify(CONFIG_TEXT_BASE)	\
 			" +$filesize; "	\
-		"erase " __stringify(CONFIG_SYS_TEXT_BASE)		\
+		"erase " __stringify(CONFIG_TEXT_BASE)		\
 			" +$filesize; "	\
-		"cp.b $loadaddr " __stringify(CONFIG_SYS_TEXT_BASE)	\
+		"cp.b $loadaddr " __stringify(CONFIG_TEXT_BASE)	\
 			" $filesize; "	\
-		"protect on " __stringify(CONFIG_SYS_TEXT_BASE)		\
+		"protect on " __stringify(CONFIG_TEXT_BASE)		\
 			" +$filesize; "	\
-		"cmp.b $loadaddr " __stringify(CONFIG_SYS_TEXT_BASE)	\
+		"cmp.b $loadaddr " __stringify(CONFIG_TEXT_BASE)	\
 			" $filesize\0"	\
 	"fdtaddr=780000\0"						\
 	"fdtfile=" CONFIG_FDTFILE "\0"					\