MAMNV BR151: naming changes

- brand seems to be all caps, as does the model.
- remove brand from top level name, in case the device is sold under other brands, as is common for Tuya devices.

custom_components/tuya_local/devices/mamnv_br151_vacuum_and_mop.yaml

@@ -1,7 +1,7 @@
-name: Mamnv vacuum and mop
+name: Vacuum and mop
 products:
   - id: ela0pxryflaldubr
-    name: Mamnv br151
+    name: MAMNV BR151
 primary_entity:
   entity: vacuum
   dps: