led: Generalize template evaluation so it is not dependent on LEDs

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

klippy/extras/pca9632.py

@@ -3,7 +3,7 @@
 # Copyright (C) 2022  Ricardo Alcantara <ricardo@vulcanolabs.com>
 #
 # This file may be distributed under the terms of the GNU GPLv3 license.
-from . import bus, mcp4018
+from . import bus, led, mcp4018
 
 BACKGROUND_PRIORITY_CLOCK = 0x7fffffff00000000
 
@@ -34,8 +34,7 @@ class PCA9632:
             raise config.error("Invalid color_order '%s'" % (color_order,))
         self.color_map = ["RGBW".index(c) for c in color_order]
         self.prev_regs = {}
-        pled = printer.load_object(config, "led")
-        self.led_helper = pled.setup_helper(config, self.update_leds, 1)
+        self.led_helper = led.LEDHelper(config, self.update_leds, 1)
         printer.register_event_handler("klippy:connect", self.handle_connect)
     def reg_write(self, reg, val, minclock=0):
         if self.prev_regs.get(reg) == val: