ARM: dts: vf610-zii-scu4-aib: Specify 'i2c-mux-idle-disconnect'

Specify 'i2c-mux-idle-disconnect' for both I2C switches present on the
board, since both are connected to the same parent bus and all of
their children have the same I2C address.

Fixes: ca4b4d373fcc ("ARM: dts: vf610: Add ZII SCU4 AIB board")
Signed-off-by: Andrey Smirnov <[e-mail]>
Cc: Shawn Guo <[e-mail]>
Cc: Chris Healy <[e-mail]>
Cc: Cory Tusar <[e-mail]>
Cc: Jeff White <[e-mail]>
Cc: Rick Ramstetter <[e-mail]>
Cc: Lucas Stach <[e-mail]>
Cc: Fabio Estevam <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Tested-by: Chris Healy <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/vf610-zii-scu4-aib.dts

···
 		#address-cells = <1>;
 		#size-cells = <0>;
 		reg = <0x70>;
+		i2c-mux-idle-disconnect;
 
 		sff0_i2c: i2c@1 {
 			#address-cells = <1>;
···
 		reg = <0x71>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
 		sff5_i2c: i2c@1 {
 			#address-cells = <1>;