Fix mqtt schema import not available for mqtt_room (#102866)

homeassistant/components/mqtt/__init__.py

@@ -47,6 +47,7 @@ from .client import (  # noqa: F401
     publish,
     subscribe,
 )
+from .config import MQTT_BASE_SCHEMA, MQTT_RO_SCHEMA, MQTT_RW_SCHEMA  # noqa: F401
 from .config_integration import CONFIG_SCHEMA_BASE
 from .const import (  # noqa: F401
     ATTR_PAYLOAD,

homeassistant/components/mqtt_room/sensor.py

@@ -47,7 +47,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
         vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
         vol.Optional(CONF_UNIQUE_ID): cv.string,
     }
-).extend(mqtt.config.MQTT_RO_SCHEMA.schema)
+).extend(mqtt.MQTT_RO_SCHEMA.schema)
 
 
 @lru_cache(maxsize=256)