ARM: dts: Add #pinctrl-cells for pinctrl-single instances

Drivers using pinctrl-single,pins have #pinctrl-cells = <1>, while
pinctrl-single,bits need #pinctrl-cells = <2>.

Note that this patch can be optionally applied separately from the
driver changes as the driver supports also the legacy binding without
#pinctrl-cells.

Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 194d884..3a3fde1 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -130,6 +130,7 @@
 				reg = <0x210000 0x2000>;
 				#address-cells = <1>;
 				#size-cells = <1>;
+				#pinctrl-cells = <1>;
 				ranges = <0 0x210000 0x2000>;
 
 				am33xx_pinmux: pinmux@800 {
@@ -137,6 +138,7 @@
 					reg = <0x800 0x238>;
 					#address-cells = <1>;
 					#size-cells = <0>;
+					#pinctrl-cells = <1>;
 					pinctrl-single,register-width = <32>;
 					pinctrl-single,function-mask = <0x7f>;
 				};