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/lib/trace.c b/lib/trace.c
index 505a318..54f0bf2 100644
--- a/lib/trace.c
+++ b/lib/trace.c
@@ -53,7 +53,7 @@
 	if (gd->flags & GD_FLG_RELOC)
 		offset -= gd->relocaddr;
 	else
-		offset -= CONFIG_SYS_TEXT_BASE;
+		offset -= CONFIG_TEXT_BASE;
 #endif
 	return offset / FUNC_SITE_SIZE;
 }
@@ -123,7 +123,7 @@
 	if (hdr->ftrace_count < hdr->ftrace_size) {
 		struct trace_call *rec = &hdr->ftrace[hdr->ftrace_count];
 
-		rec->func = CONFIG_SYS_TEXT_BASE;
+		rec->func = CONFIG_TEXT_BASE;
 		rec->caller = 0;
 		rec->flags = FUNCF_TEXTBASE;
 	}