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/vocore2.h b/include/configs/vocore2.h
index 6a7a083..b2572ca 100644
--- a/include/configs/vocore2.h
+++ b/include/configs/vocore2.h
@@ -16,7 +16,7 @@
 
 /* SPL */
 
-#define CONFIG_SYS_UBOOT_START		CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_UBOOT_START		CONFIG_TEXT_BASE
 
 /* Dummy value */
 #define CONFIG_SYS_UBOOT_BASE		0