ram: Move postcopy_requests into RAMState

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
diff --git a/migration/migration.c b/migration/migration.c
index e430aec..2990c40 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -657,7 +657,7 @@
         (1ul << qemu_target_page_bits());
     info->ram->mbps = s->mbps;
     info->ram->dirty_sync_count = ram_dirty_sync_count();
-    info->ram->postcopy_requests = s->postcopy_requests;
+    info->ram->postcopy_requests = ram_postcopy_requests();
 
     if (s->state != MIGRATION_STATUS_COMPLETED) {
         info->ram->remaining = ram_bytes_remaining();
@@ -1120,7 +1120,6 @@
     s->setup_time = 0;
     s->start_postcopy = false;
     s->postcopy_after_devices = false;
-    s->postcopy_requests = 0;
     s->migration_thread_running = false;
     error_free(s->error);
     s->error = NULL;
@@ -1480,7 +1479,7 @@
         return;
     }
 
-    if (ram_save_queue_pages(ms, rbname, start, len)) {
+    if (ram_save_queue_pages(rbname, start, len)) {
         mark_source_rp_bad(ms);
     }
 }