add alienware M15R3 config

[samuaz]

This is a config for alienware M15R3 I9+NVIDIA RTX 2080 working pretty nice!

i need some review for this part:

	"RegisterWriteConfigurations": [
	   {
		"WriteMode": "Set",
		"WriteOccasion": "OnWriteFanSpeed",
		"Register": 0x17,
		"Value": 10,
		"ResetRequired": true,
		"ResetValue": 10,
		"ResetWriteMode": "Set",
		"Description": "CPU FAN"
	   },
	   {
		"WriteMode": "Set",
		"WriteOccasion": "OnWriteFanSpeed",
		"Register": 0x18,
		"Value": 10,
		"ResetRequired": true,
		"ResetValue": 10,
		"ResetWriteMode": "Set",
		"Description": "GPU FAN"
	   }
	]
   }

not sure what are the expected registers there

Alienware registers
0x17 -> CPU fan read/write
0x18 -> GPU fan read/write

so I just put in registers the same as the TemperatureThresholds