dtc: srcpos_verror() should print to stderr

Errors should go to stderr.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/srcpos.c b/srcpos.c
index 246ab4b..c20bc53 100644
--- a/srcpos.c
+++ b/srcpos.c
@@ -297,9 +297,9 @@
 
        srcstr = srcpos_string(pos);
 
-       fprintf(stdout, "Error: %s ", srcstr);
-       vfprintf(stdout, fmt, va);
-       fprintf(stdout, "\n");
+       fprintf(stderr, "Error: %s ", srcstr);
+       vfprintf(stderr, fmt, va);
+       fprintf(stderr, "\n");
 }
 
 void