Repair SUPPORT_XCELL_RT support for hardware >= 2.x

The automatic compile test failed.
This puts back the logic that got changed in this commit:

commit faa630d

    Add support for new SEMPU bottom bracket

    with two pas wires (as Thun X-Cell RT)

Author: thomasjfox

Arduino_Pedelec_Controller/Arduino_Pedelec_Controller.ino

@@ -278,7 +278,7 @@ static volatile boolean torque_want_calculation = false; //read torque values in
 #if HARDWARE_REV<20 && defined(SUPPORT_XCELL_RT)
 const int torquevalues_count=8;
 volatile int torquevalues[torquevalues_count]= {0,0,0,0,0,0,0,0}; //stores the 8 torque values per pedal roundtrip
-#elif defined(SUPPORT_SEMPU_V1)
+#elif defined(SUPPORT_SEMPU_V1) || defined(SUPPORT_XCELL_RT)
 const int torquevalues_count=16;
 volatile int torquevalues[torquevalues_count]= {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; //stores the 16 torque values per pedal roundtrip (Thun) or half roundtrip (Sempu)
 #elif defined(SUPPORT_SEMPU)