manager: relabel Dell Inc. → Dell

This is mostly in preparation for the host identification via DMI
where 'Dell Inc.' is used, whereby the thunderbolt host controller
usually identifies itself as "Dell". To stay consistent we relabel
the dmi id one.

boltd/bolt-manager.c

@@ -1318,6 +1318,7 @@ bolt_manager_label_device (BoltManager *mgr,
     const char *from;
     const char *to;
   } vendors[] = {
+    {"Dell Inc.",   "Dell" },
     {"HP Inc.",     "HP"   },
     {"Apple, Inc.", "Apple"}
   };