Input: xpad - Add support for Xbox ONE liquid metal controller

I found that my controller wasn't working with this driver.  The LED would light up and it could rumble but was not registering any button presses or joystick movements.  I suspected the problem might be that it was not being sent some required init packet so I tried sending the packets being used in xboxone_init_packets and found that sending xboxone_pdp_auth got the controller working.  At least for my controller xboxone_pdp_led_on was not strictly necessary but I decided to follow the same pattern used by the other two controllers.

xpad.c

@@ -690,8 +690,10 @@ static const struct xboxone_init_packet xboxone_init_packets[] = {
 	XBOXONE_INIT_PKT(0x045e, 0x0b00, extra_input_packet_init),
 	XBOXONE_INIT_PKT(0x0e6f, 0x0000, xboxone_pdp_led_on),
 	XBOXONE_INIT_PKT(0x1430, 0x079b, xboxone_pdp_led_on),
+        XBOXONE_INIT_PKT(0x20d6, 0xa01a, xboxone_pdp_led_on),
 	XBOXONE_INIT_PKT(0x0e6f, 0x0000, xboxone_pdp_auth),
 	XBOXONE_INIT_PKT(0x1430, 0x079b, xboxone_pdp_auth),
+        XBOXONE_INIT_PKT(0x20d6, 0xa01a, xboxone_pdp_auth),
 	XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_rumblebegin_init),
 	XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_rumblebegin_init),
 	XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_rumblebegin_init),