OvmfPkg: PlatformDxe: add save and discard buttons to the form

The RouteConfig() function is also called now as expected.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15373 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/PlatformDxe/PlatformForms.vfr

@@ -56,6 +56,19 @@ formset
     // We'll dynamically generate a one-of-many selection at this label.
     //
     label LABEL_RES_NEXT;
+
+    text
+      help  = STRING_TOKEN(STR_SAVE_EXIT),
+      text  = STRING_TOKEN(STR_SAVE_EXIT),
+      flags = INTERACTIVE,
+      key   = QUESTION_SAVE_EXIT;
+
+    text
+      help  = STRING_TOKEN(STR_DISCARD_EXIT),
+      text  = STRING_TOKEN(STR_DISCARD_EXIT),
+      flags = INTERACTIVE,
+      key   = QUESTION_DISCARD_EXIT;
+
   endform;
 
 endformset;