qconfig: Sort the boards by name when finding

There is no particular ordering of the board list at present, since it
is generated by a multi-threaded process. Sort them by name to make it
easier to see if a particular board is present.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/qconfig.py b/tools/qconfig.py
index 71fe6ff..241bd9e 100755
--- a/tools/qconfig.py
+++ b/tools/qconfig.py
@@ -1142,7 +1142,7 @@
             if has_cfg == want:
                 out.add(defc)
     print(f'{len(out)} matches')
-    print(' '.join(item.split('_defconfig')[0] for item in out))
+    print(' '.join(item.split('_defconfig')[0] for item in sorted(list(out))))
     return 0