Update entity.py

[msavazzi]

Added the number of the gang/line on multi devices like the TX

[AlexxIT]

Multigang support naming for each channel from ewlink app:

SonoffLAN/custom_components/sonoff/switch.py

Lines 37 to 45 in 806d5e5

	def __init__(self, ewelink: XRegistry, device: dict):
	XEntity.__init__(self, ewelink, device)
	try:
	self._attr_name = device["tags"]["ck_channel_name"][str(self.channel)]
	except KeyError:
	pass
	# backward compatibility
	self._attr_unique_id = f"{device['deviceid']}_{self.channel + 1}"

[msavazzi]

@AlexxIT you're right, if the first part of the name is identical to the Device ID it is removed, so my change now does not work anymore :( I've updated it to replace the . in the device name with : so I can have the gang id after.
Quite annoying :(