mlxsw: core_thermal: Add line card id prefix to line card thermal zone name

Add prefix "lc#n" to thermal zones associated with the thermal objects
found on line cards.

For example thermal zone for module #9 located at line card #7 will
have type:
mlxsw-lc7-module9.
And thermal zone for gearbox #3 located at line card #5 will have type:
mlxsw-lc5-gearbox3.
Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/core_thermal.c

@@ -685,6 +685,10 @@ mlxsw_thermal_module_tz_init(struct mlxsw_thermal_module *module_tz)
 	char tz_name[MLXSW_THERMAL_ZONE_MAX_NAME];
 	int err;
 
+	if (module_tz->slot_index)
+		snprintf(tz_name, sizeof(tz_name), "mlxsw-lc%d-module%d",
+			 module_tz->slot_index, module_tz->module + 1);
+	else
 		snprintf(tz_name, sizeof(tz_name), "mlxsw-module%d",
 			 module_tz->module + 1);
 	module_tz->tzdev = thermal_zone_device_register(tz_name,
@@ -820,6 +824,10 @@ mlxsw_thermal_gearbox_tz_init(struct mlxsw_thermal_module *gearbox_tz)
 	char tz_name[MLXSW_THERMAL_ZONE_MAX_NAME];
 	int ret;
 
+	if (gearbox_tz->slot_index)
+		snprintf(tz_name, sizeof(tz_name), "mlxsw-lc%d-gearbox%d",
+			 gearbox_tz->slot_index, gearbox_tz->module + 1);
+	else
 		snprintf(tz_name, sizeof(tz_name), "mlxsw-gearbox%d",
 			 gearbox_tz->module + 1);
 	gearbox_tz->tzdev = thermal_zone_device_register(tz_name,