tmc2130: Transmit register initialization during connect callback

Perform the register initialization directly from TMCCommandHelper and
perform it during the "connect" phase.  This unifies the register
setup for the TMC2130, TMC2208, TMC2660, and TMC5160.

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

klippy/extras/tmc2208.py

@@ -309,8 +309,6 @@ class TMC2208:
     def __init__(self, config):
         self.printer = config.get_printer()
         self.name = config.get_name().split()[-1]
-        self.printer.register_event_handler("klippy:connect",
-                                            self._handle_connect)
         # Setup mcu communication
         self.regs = collections.OrderedDict()
         self.fields = tmc2130.FieldHelper(Fields, SignedFields, FieldFormatters,
@@ -354,15 +352,6 @@ class TMC2208:
         set_config_field(config, "pwm_autograd", True)
         set_config_field(config, "PWM_REG", 8)
         set_config_field(config, "PWM_LIM", 12)
-    def _init_registers(self):
-        # Send registers
-        for reg_name, val in self.regs.items():
-            self.set_register(reg_name, val)
-    def _handle_connect(self):
-        try:
-            self._init_registers()
-        except self.printer.command_error as e:
-            raise self.printer.config_error(str(e))
     def query_registers(self, print_time=0.):
         out = []
         for reg_name in ReadRegisters: