[homematic]Pass channel to light color functions (#27306)

The device HmIP-BSL has two independent LEDs on two different channels,
so the channel needs to be explictly specified when setting the color.

homeassistant/components/homematic/light.py

@@ -66,7 +66,7 @@ class HMLight(HMDevice, Light):
         """Return the hue and saturation color value [float, float]."""
         if not self.supported_features & SUPPORT_COLOR:
             return None
-        hue, sat = self._hmdevice.get_hs_color()
+        hue, sat = self._hmdevice.get_hs_color(self._channel)
         return hue * 360.0, sat * 100.0
 
     @property
@@ -98,6 +98,7 @@ class HMLight(HMDevice, Light):
             self._hmdevice.set_hs_color(
                 hue=kwargs[ATTR_HS_COLOR][0] / 360.0,
                 saturation=kwargs[ATTR_HS_COLOR][1] / 100.0,
+                channel=self._channel,
             )
         if ATTR_EFFECT in kwargs:
             self._hmdevice.set_effect(kwargs[ATTR_EFFECT])