ARM: dts: imx6dl-prtrvt: drop undocumented TRF7970A NFC properties

Neither the bindings nor the device driver use/document
"vin-voltage-override" and "t5t-rmb-extra-byte-quirk" properties.

Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6dl-prtrvt.dts

@@ -67,11 +67,9 @@ nfc@0 {
 		ti,enable-gpios = <&gpio5 12 GPIO_ACTIVE_LOW>,
 				  <&gpio5 11 GPIO_ACTIVE_LOW>;
 		vin-supply = <&reg_3v3>;
-		vin-voltage-override = <3100000>;
 		autosuspend-delay = <30000>;
 		irq-status-read-quirk;
 		en2-rf-quirk;
-		t5t-rmb-extra-byte-quirk;
 		status = "okay";
 	};
 };