ARM: dts: vf610-zii-cfu1: Slow I2C0 down to 100 kHz

Fiber-optic modules attached to the bus are only rated to work at
100 kHz, so decrease the bus frequency to accommodate that.

Signed-off-by: Andrey Smirnov <[e-mail]>
Cc: Shawn Guo <[e-mail]>
Cc: Chris Healy <[e-mail]>
Cc: Fabio Estevam <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/vf610-zii-cfu1.dts

···
 };
 
 &i2c0 {
-	clock-frequency = <400000>;
+	clock-frequency = <100000>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_i2c0>;
 	status = "okay";