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/congatec/cgtqmx8/cgtqmx8.c b/board/congatec/cgtqmx8/cgtqmx8.c
index a50a052..c211cb5 100644
--- a/board/congatec/cgtqmx8/cgtqmx8.c
+++ b/board/congatec/cgtqmx8/cgtqmx8.c
@@ -425,7 +425,7 @@
 	char *end_of_uboot;
 	char command[256];
 
-	end_of_uboot = (char *)(ulong)(CONFIG_SYS_TEXT_BASE + _end_ofs
+	end_of_uboot = (char *)(ulong)(CONFIG_TEXT_BASE + _end_ofs
 			+ fdt_totalsize(gd->fdt_blob));
 	end_of_uboot += 9;