ARM: sunxi: DT: Convert the DTs to use a header for the pinctrl nodes

The pinctrl nodes require some extra opaque arguments for the pull up and drive
strength values.

Introduce a new header file and convert the device trees to replace these
opaque numbers by defines.

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

arch/arm/boot/dts/sun4i-a10-mini-xplus.dts

@@ -52,6 +52,7 @@
 #include "sunxi-common-regulators.dtsi"
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/sun4i-a10.h>
 
 / {
 	model = "PineRiver Mini X-Plus";
@@ -93,7 +94,7 @@
 		pinctrl@01c20800 {
 			ir0_pins_a: ir0@0 {
 				/* The ir receiver is not always populated */
-				allwinner,pull = <1>;
+				allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
 			};
 		};