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/board/synopsys/axs10x/headerize-axs.py b/board/synopsys/axs10x/headerize-axs.py
index fa6aaf3..3275218 100644
--- a/board/synopsys/axs10x/headerize-axs.py
+++ b/board/synopsys/axs10x/headerize-axs.py
@@ -65,7 +65,7 @@
     arc_id              = 0x53
 
     # initial header values: place where preloader will store u-boot binary,
-    # should be equal to CONFIG_SYS_TEXT_BASE
+    # should be equal to CONFIG_TEXT_BASE
     image_copy_adr  = 0x81000000
 
     # initial constant header values, do not change these values