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/ls1021aqds.h b/include/configs/ls1021aqds.h
index d383b6c..37b8cd7 100644
--- a/include/configs/ls1021aqds.h
+++ b/include/configs/ls1021aqds.h
@@ -16,8 +16,8 @@
 
 #ifdef CONFIG_NAND_BOOT
 #define CONFIG_SYS_NAND_U_BOOT_SIZE	(400 << 10)
-#define CONFIG_SYS_NAND_U_BOOT_DST	CONFIG_SYS_TEXT_BASE
-#define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_NAND_U_BOOT_DST	CONFIG_TEXT_BASE
+#define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_TEXT_BASE
 
 #define CONFIG_SYS_MONITOR_LEN		0x80000
 #endif