ARM: dts: sun6i: primo81: Remove useless io-channel-cells

The mma8452 binding doesn't expect an io-channel-cells property, let's
remove it.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Jernej Skrabec <jernej.skrabec@siol.net>
Link: https://lore.kernel.org/r/20210114113538.1233933-10-maxime@cerno.tech

arch/arm/boot/dts/sun6i-a31s-primo81.dts

@@ -115,7 +115,6 @@ accelerometer@1c {
 		reg = <0x1c>;
 		interrupt-parent = <&pio>;
 		interrupts = <0 9 IRQ_TYPE_LEVEL_HIGH>; /* PA9 */
-		#io-channel-cells = <1>;
 	};
 };