Fix sensor setup for battery (dis)charging power

* `CurBatChaArr.1` is a subcomponent of the overall value in
`CurBatCha`, thus it should have the `_a` identifier.
* Swap the `_a` and `_total_` identifiers for `CurBatDsch` and
`CurBatDschArr.1`, reflecting the subcomponent hierarchy as well.

In both cases, the `Arr.1` value is slightly different from the total
value for me, but it is not obvious why and how. I just have one
battery, so in my world they should be the same. Therefore I'd stick
to the hierarchical setup. If needed both can be made available in Home
Assistant.

pysma/definitions_ennexos.py

@@ -825,12 +825,12 @@
         Sensor("BatChrg.BatChrgArr.1", None, factor=1, unit=None),
         Sensor("BatChrg.BatChrg", None, factor=1, unit=None),
         Sensor("BatChrg.CurBatCha", Identifier.battery_power_charge_total, factor=1, unit="W"),
-        Sensor("BatChrg.CurBatChaArr.1", Identifier.battery_power_charge_total, factor=1, unit="W"),
+        Sensor("BatChrg.CurBatChaArr.1", Identifier.battery_power_charge_a, factor=1, unit="W"),
         Sensor("Bat.Diag.VolMax.1", None, factor=1, unit=None),
         Sensor("BatDsch.BatDschArr.1", None, factor=1, unit=None),
         Sensor("BatDsch.BatDsch", None, factor=1, unit=None),
-        Sensor("BatDsch.CurBatDsch", Identifier.battery_power_discharge_a, factor=1, unit="W"),
-        Sensor("BatDsch.CurBatDschArr.1", Identifier.battery_discharge_total, factor=1, unit="W"),
+        Sensor("BatDsch.CurBatDsch", Identifier.battery_power_discharge_total, factor=1, unit="W"),
+        Sensor("BatDsch.CurBatDschArr.1", Identifier.battery_power_discharge_a, factor=1, unit="W"),
         Sensor("Bat.OpTms.1", None, factor=1, unit=None),
         Sensor("Bat.Vol.1", Identifier.battery_voltage_a, factor=1, unit="V"),
         Sensor("ChaSess.WhIn", None, factor=1, unit=None),