ARM: sun8i: a23/a33: Add the oscillators accuracy

The datasheet provided by Allwinner requires oscillators with an accuracy
of 50ppm. Add it to our fixed clocks so that we can properly track the
accuracy chain.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun8i-a23-a33.dtsi

@@ -106,6 +106,7 @@ osc24M: osc24M_clk {
 			#clock-cells = <0>;
 			compatible = "fixed-clock";
 			clock-frequency = <24000000>;
+			clock-accuracy = <50000>;
 			clock-output-names = "osc24M";
 		};
 
@@ -113,6 +114,7 @@ ext_osc32k: ext_osc32k_clk {
 			#clock-cells = <0>;
 			compatible = "fixed-clock";
 			clock-frequency = <32768>;
+			clock-accuracy = <50000>;
 			clock-output-names = "ext-osc32k";
 		};
 	};