endstop_phase: Convert to using tmc mcu_phase_offset

Now that the TMC drivers track the phase offset, use that to implement
endstop phase.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/tmc5160.py

@@ -294,8 +294,7 @@ class TMC5160:
         current_helper = TMC5160CurrentHelper(config, self.mcu_tmc)
         cmdhelper = tmc.TMCCommandHelper(config, self.mcu_tmc, current_helper)
         cmdhelper.setup_register_dump(ReadRegisters)
-        self.get_microsteps = cmdhelper.get_microsteps
-        self.get_phase = cmdhelper.get_phase
+        self.get_phase_offset = cmdhelper.get_phase_offset
         # Setup basic register values
         tmc.TMCStealthchopHelper(config, self.mcu_tmc, TMC_FREQUENCY)
         #   CHOPCONF