ARM: sunxi: dts: split IR pins for A10 and A20

Currently none of the target boards nor the driver supports
IR TX. However this pin is used in a few instances as a GPIO.
Split the pin ctrl descriptions so that only the IR RX is
configured to be used.

Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts

@@ -125,7 +125,7 @@
 
 &ir0 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&ir0_pins_a>;
+	pinctrl-0 = <&ir0_rx_pins_a>;
 	status = "okay";
 };