fix: p4_driver now has _name variable

src/device/service/drivers/p4/p4_driver.py

@@ -81,7 +81,7 @@ class P4Driver(_Driver):
         self.__endpoint = None
         self.__settings = settings
         self.__id = None
-        self.__name = None
+        self.__name = DRIVER_NAME
         self.__vendor = P4_VAL_DEF_VENDOR
         self.__hw_version = P4_VAL_DEF_HW_VER
         self.__sw_version = P4_VAL_DEF_SW_VER