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>

arch/arm/boot/dts/omap4.dtsi

@@ -184,6 +184,7 @@
 					reg = <0x40 0x0196>;
 					#address-cells = <1>;
 					#size-cells = <0>;
+					#pinctrl-cells = <1>;
 					#interrupt-cells = <1>;
 					interrupt-controller;
 					pinctrl-single,register-width = <16>;
@@ -256,6 +257,7 @@
 					reg = <0x1e040 0x0038>;
 					#address-cells = <1>;
 					#size-cells = <0>;
+					#pinctrl-cells = <1>;
 					#interrupt-cells = <1>;
 					interrupt-controller;
 					pinctrl-single,register-width = <16>;